Electoral Accountability and Political Selection
Study how the prospect of remaining in office changes an officeholder's behavior and how information allows voters to choose between politicians with different types. Basic: One encounter or four encounters with fixed or reassigned groups. Extended: Eight treatments on continuation, information, types, office value, term limits, and audits.
Address: accountability.beer-lab.org
Aggregate Demand and Aggregate Supply
Understand how spending choices aggregate into demand and how equilibrium with supply determines output and prices. Basic: One period, ten periods with the same economy, or ten periods with reassigned economies. Extended: Demand expansion and contraction, supply shock, fiscal stimulus, capacity, expectations, and coordination.
Address: adas.beer-lab.org
Digital Advertising Auction
Study position auctions, cost per click, relevance, reserve thresholds, information, and strategic learning. Basic: One round, ten periods with a fixed market, and ten periods with reassigned markets under relevance-weighted GSP. Extended: Benchmark GSP, first price, ranking without relevance, high reserve, concentrated clicks, similar clicks, limited feedback, and one-position second price.
Address: adauction.beer-lab.org
Credit with adverse selection
Relate credit terms to applicant composition and collection. Basic: One interaction; ten fixed-group rounds; ten rematched rounds. Extended: Reference and seventeen extensions, six rounds per condition.
Address: adversecredit.beer-lab.org
Informative and Persuasive Advertising
Choose price and advertising against ten simulated consumers; compare awareness and valuation changes, increasing costs, profit, uncertainty, and welfare. Basic: One persuasive decision, one informative decision, or a two-decision comparison with low advertising costs. Extended: Five-decision learning, high advertising costs, alternative orders, cost changes, a five-ad limit, and costly production; each mechanism can be activated separately.
Address: advertising.beer-lab.org
Alliances, Burden Sharing, and Collective Defense
Examine collective defense, coordination, and burden sharing. Basic: One encounter, ten fixed-group rounds, or ten rematched rounds retaining positions. Extended: Six-round reference and nine configurations: low and high threat, announcements, inequality, attacker, assistance, commitment, weakest link, and best shot.
Address: alliances.beer-lab.org
All-Pay Auctions and R&D Races
Participants compete for a prize and everyone pays their bid or investment, including those who lose, making rent dissipation and overinvestment observable. The basic version uses private values over one or ten rounds with fixed or reassigned groups. The extended version adds complete information, Tullock contests, R&D races, uncertain innovation, technology spillovers, and asymmetric research costs.
Address: allpay.beer-lab.org
Alternating-Offers Bargaining
Teach sequential bargaining, backward induction, subgame perfection, time discounting, delay, bargaining power, and behavioral departures. Basic: One negotiation, ten with a fixed partner, or ten with reassignment; at most five proposals and discount factors of 0.90 for both positions. Extended: Baseline, short horizon, asymmetric impatience, fixed delay cost, breakdown risk, outside option, and structured communication.
Address: alternatingoffers.beer-lab.org
Armaments, Security Competition, and Inspections
Connect relative position, joint costs, and control institutions. Basic: One encounter, ten fixed-pair rounds, or ten rematched rounds. Extended: Reference plus six extensions: limit, agreement, inspection, stock, offense and defense, private valuations.
Address: armssecurity.beer-lab.org
Asset Market (Bubbles)
Classic Smith, Suchanek and Williams (1988) design: an asset is bought and sold in a continuous market over several periods; at the end of each period every unit pays a random dividend (0, 8, 28 or 60 ECU) and the remaining expected value falls to zero. Cash and units carry over between periods. 5 periods (demo) or 15 periods, plus an extended version with chat.
Address: assetmarket.beer-lab.org
Bank Run
Five depositors simultaneously decide whether to withdraw early or keep their funds in the bank; too many withdrawals can exhaust liquidity and turn expectations into a bank run. The basic version offers one decision or ten periods with the same or reassigned banks. The extended version compares deposit insurance, greater liquidity, public information, private signals, visible history, and structured communication.
Address: bankrun.beer-lab.org
Bargaining and Conflict
Study allocation and costly conflict under public information. Basic: One encounter; ten with a fixed pair; ten with reassigned pairs. Extended: Baseline and eleven extensions concerning probabilities, costs, communication, protocol, divisibility and risk.
Address: bargainingconflict.beer-lab.org
p-Beauty Contest
Teach strategic interaction, iterated dominance, Nash equilibrium, level-k reasoning, and learning. Basic: Four configurations per language: p=2/3 for one and ten rounds, plus one-shot p=1/2 and p=3/4. Extended: Eight configurations per language covering p, feedback, groups, range, and beliefs.
Address: beautycontest.beer-lab.org
Beer Game: Inventory and Bullwhip Effect
Teams of four manage the stages of a supply chain and place orders while facing delivery delays, inventories, and backlogs, with the goal of reducing total cost. The basic versions compare constant demand, an unexpected demand step, and a 24-week simulation. The extended version changes information, communication, delivery delays, decision support, order batching, and promotions.
Address: beergame.beer-lab.org
Price Competition (Bertrand)
Cournot's twin on the same market (demand 130 − p, unit cost 10): each firm posts a price and all demand goes to the cheapest one. Duopoly for one round or ten rounds with a fixed or reassigned rival, plus an extended version (monopoly, three and four firms, reassigned markets, chat, no calculator, each rival's result shown).
Address: bertrand.beer-lab.org
Big Five and Economic Decisions
Address: bigfive.beer-lab.org
Big Push and Persistent Capital
Coordinate investments to reach a collective threshold and examine persistence after a temporary intervention. Basic: One interaction; ten periods with a fixed group; ten periods with rematched groups. Extended: Reference and ten extensions: announcements, observable first choice, partial reimbursement, temporary subsidy, external contribution, persistent capital, capital and announcements, one-time capital grant, high initial capital and announced destruction.
Address: bigpush.beer-lab.org
Bomb Risk Elicitation Task
Make visible the tradeoff between an increasing potential reward and an increasing probability of losing it. Basic: Static choice, dynamic collection, and a comparison of both modes. Extended: High stakes, 25- and 400-box grids, random order, faster collection, five decisions, and neutral wording.
Address: bombrisk.beer-lab.org
Bonds, Yield and Default
Value dated bond payments and distinguish promised yield, effective return and recovery. Basic: One market; ten fixed-group or randomly reassigned markets. Extended: Nineteen rate, coupon, maturity, risk, priority, information, funding and resale conditions.
Address: bonds.beer-lab.org
Corruption and Bribery
One person offers a payment to an official, who decides whether to grant a permission affecting a third party. Includes one encounter, ten rounds with fixed or reassigned groups, and extensions on audits, sanctions, costly reporting and amnesty, decision histories, intermediation and absence of external harm. The report separates offers, permissions, detection, reporting and role-specific payoffs to discuss reciprocity, deterrence and externalities. Basic: One round; ten with fixed groups; ten with rematching. Extended: 9 configurations per language, including controls.
Address: bribery.beer-lab.org
Bureaucracy and Policy Implementation
P decides whether to delegate a policy to A, who has information about the state and a different objective. Includes one round, ten with fixed pairs or rematching, and extensions on alignment, information noise, bounded delegation, monitoring and hierarchical replacement. The report separates authority, recommendations, policy accuracy and bias, and payoffs by role. Basic: One round; ten with fixed groups; ten with rematching. Extended: 10 configurations per language, including controls.
Address: bureaucracy.beer-lab.org
Confidence Calibration and Trading
Separate confidence calibration, relative beliefs and financial trading. Basic: One market; ten fixed-group or randomly reassigned periods. Extended: Fourteen feedback, information, commission, liquidity and management conditions.
Address: calibrationtrading.beer-lab.org
Call Market (Batch Clearing Auction)
Buyers and sellers with private values and costs simultaneously submit one sealed order; the market clears once per period at a single uniform price for every trade. Fourth institution of the market battery, to compare with the double auction, the pit market and posted offers. One period or 8 periods, plus an extended version with chat.
Address: callmarket.beer-lab.org
Carbon Market
The whole class trades a product in a continuous double auction; every unit sold pollutes and its environmental cost is shared by everyone. After three free-market periods (which overproduce), every unit sold requires a permit: sellers buy them in a uniform-price auction or receive them for free and trade them among themselves. Students see the emissions cap, the permit price, the pass-through to the product price and the rents from free allocation (Plott, 1983; Montgomery, 1972). Extended version: Pigouvian tax, maximum-cost standard or no policy.
Address: carbonmarket.beer-lab.org
Centipede Game
Teach backward induction, subgame perfection, strategic reasoning, reciprocity, and the descriptive limits of theory. Basic: Three configurations per language: one game; 10 with a fixed partner; 10 with rematching. Extended: Nine configurations per language covering horizon, payoffs, roles, communication, strategies, and termination.
Address: centipede.beer-lab.org
Clientelism, Brokers, and Ballot Secrecy
A candidate distributes resources to five voters choosing C or R. Compare advance and contingent transfers, ballot secrecy, brokers, and universal benefits. Discuss majority outcomes, material incentives, reciprocity, and the information available to each role. Basic: One interaction, ten fixed-group rounds, or ten rounds with voter reassignment. Extended: Full and partial observation; conditional payment; private, transparent, or reviewed brokerage; universal mode and productivity; public or private heterogeneous values.
Address: clientelism.beer-lab.org
Coordination and Collective Action
Analyze coordination, thresholds, costs and information in producing a collective outcome. Basic: One interaction, ten fixed-group rounds or ten rematched rounds. Extended: Twelve eight-round configurations: reference and variants on thresholds, information, costs, sequence, announcements and removal.
Address: collectiveaction.beer-lab.org
Collective Actions and Redress for Dispersed Harm
Connect funding, membership, representation, and redress in actions for dispersed harm. Basic: One case; ten with fixed groups or rematching with stable roles. Extended: 9 conditions, including the reference; ten cases.
Address: collectiveclaims.beer-lab.org
Common-Value Auction
Observe how bidders use imperfect signals and why winning can reveal an overly optimistic estimate. Basic: First-price sealed bid: one round, ten fixed-market rounds, or ten reassigned-market rounds. Extended: Ascending reconstruction, high or low precision, eight bidders, public signal, and limited feedback.
Address: commonauction.beer-lab.org
Common Budget and Local Projects
Explain concentrated project benefits, shared costs and institutional selection. Basic: One round, ten fixed-group rounds or ten randomly rematched rounds. Extended: Fifteen six-round conditions: financing, caps, review, voting, debt and project quality.
Address: commonbudget.beer-lab.org
Common-Pool Resource Game
Groups of four: each member chooses an integer extraction effort between 0 and 5 and receives 100 + e(25 - Q) ECU, where Q is the group's total effort. Choosing 5 maximizes own payoff; joint income is maximized at Q = 12 or 13. One round or ten rounds with a fixed or a reassigned group, plus an extended version (structured communication, group-voted rule, peer sanctions, external rule).
Address: commonpool.beer-lab.org
Comparative Advantage
Two countries with different productivities decide what to produce and trade, allowing the class to compare autarky, specialization, terms of trade, and consumption possibilities. The basic version separates production and exchange and offers one or ten rounds. The extended version changes absolute advantage, tariffs, terms of trade, communication, productivity, and Cobb–Douglas preferences.
Address: comparativeadvantage.beer-lab.org
Democratic Consolidation and Coups
Explain how anticipated reversal affects redistribution and regime stability. Basic: One round; ten with fixed group; ten with rematching preserving roles. Extended: Twelve conditions, six rounds each: reference, costs, protected menu, crises, persistence, guarantees and information with announcements.
Address: consolidation.beer-lab.org
Consumer Choice
Each student allocates income between two goods under a budget constraint and observes the resulting bundle and utility. The basic versions change income, the price of X, the price of Y, or several budgets together. The extended version adds a Cobb–Douglas benchmark, Hicks and Slutsky compensation, preference shifts, income transfers, taxation, rationing, and revealed-preference tests.
Address: consumerchoice.beer-lab.org
Contracts, Investment, and Remedies
Study specific investment, contractual performance, and remedies for nonperformance. Basic: One encounter; ten with fixed partners; ten with reassigned partners. Extended: Fourteen presets per language covering remedies, clauses, release bargaining, enforcement, history, and cost probabilities.
Address: contractremedies.beer-lab.org
Acquisitions and Corporate Control
Explain tender offers, shareholder coordination and transfers of corporate control. Basic: One market; ten with a fixed group or role-preserving reassignment. Extended: Fourteen ownership, purchase-rule, competition, cost and information conditions.
Address: corporatecontrol.beer-lab.org
Quantity Competition (Cournot)
Each firm chooses how many units to produce and the price depends on total market output (P = 130 − Q, unit cost 10). Duopoly for one round or ten rounds with a fixed or reassigned rival, plus an extended version (monopoly, three and four firms, reassigned markets, chat, no calculator, each rival's result shown).
Address: cournot.beer-lab.org
Court Congestion, Deadlines, and Access to Justice
Compare priority, review, adjournments, and performance incentives in a capacity-constrained office. Basic: One case; ten with fixed groups or rematching with stable roles. Extended: 8 conditions, including the reference; ten cases.
Address: courtdelay.beer-lab.org
Credit Market, Interest, and Inflation
Lenders and borrowers interact in a market where the supply and demand for funds determine credit and interest rates, while real payoffs depend on inflation. The basic version offers one or ten rounds with fixed or reassigned markets. The extended version compares certain inflation, upward and downward surprises, uncertainty, indexed contracts, and a ceiling on the nominal interest rate.
Address: creditmarket.beer-lab.org
Cognitive Reflection Test
Teach cognitive reflection, intuitive errors and limits of inference. Basic: Three-problem CRT, preserving Frederick (2005) numerical structures. Extended: Seven-problem CRT from Toplak and colleagues (2014), plus separate hypothetical decisions.
Address: crt.beer-lab.org
Exchange Rates and Speculative Attacks
Understand how fundamentals, expectations, and coordination among speculators can determine whether a fixed exchange rate survives or collapses. Basic: One round; ten rounds with the same economy; or ten rounds with random reassignment across economies. Extended: Benchmark, low reserves, high reserves, private signals, public announcement, interest-rate defense, capital controls, and external support.
Address: currencyattack.beer-lab.org
Privacy, Consent, and Data Rights
Explore consent, information externalities, compensation, and collective control of fictional data. Basic: One case; ten with fixed groups or rematching with stable roles. Extended: 9 conditions, including the reference; ten cases.
Address: datarights.beer-lab.org
Hidden effort and debt contracts
Understand how the residual from a financial contract shapes subsequent activity. Basic: One interaction; ten fixed-pair rounds; ten rematched rounds. Extended: Reference and nineteen extensions, six rounds per condition.
Address: debteffort.beer-lab.org
Status Quo and Defaults
Each student chooses among alternatives when one option may be preselected, although it can always be changed before confirmation, making inertia and active choice observable. The basic version studies the status quo, organ donation, and automatic enrollment. The extended version changes the default level, green energy, privacy, implicit recommendation, switching costs, and information.
Address: defaults.beer-lab.org
De Jure and De Facto Power
Distinguish de jure power, de facto influence, and implementation of a distributive decision. Basic: One encounter; ten with fixed pairs; ten with reassignment. Extended: Nine conditions on rights, protection, organization, limits, observability, and accumulation.
Address: dejuredefacto.beer-lab.org
Democratic Erosion and Emergency Powers
Analyze when citizens delegate power to avoid gridlock and how an Executive uses the resulting discretion. Basic: One interaction, ten rounds with a fixed group, or ten independent rematched interactions. Extended: Gridlock risk, a gridlock-by-cap factorial, persistence, affinity, sunset, and judicial review.
Address: democraticconstraints.beer-lab.org
Democratization as Redistributive Commitment
Show why surrendering political power can make future redistribution credible when a current promise cannot. Basic: One or four encounters with a nonbinding promise, temporary threat, and median citizen vote under democracy. Extended: Eight conditions: benchmark, binding promise, costly threat, persistent threat, repression, partial suffrage, inequality, and crisis.
Address: democratization.beer-lab.org
Deterrence, Reputation, and Credibility
Examine when a threat of resistance deters a challenge and how information, capacity, commitment, and reputation change its credibility. Basic: One encounter; ten encounters with a fixed partner; ten encounters with partner reassignment. Roles remain constant. Extended: No message, known cost, backing-down cost, contingent deposit, verified history, history observed with error, limited capacity, and material preparation.
Address: deterrence.beer-lab.org
Dictator Game
One person unilaterally decides how to divide an endowment with another, so the distribution of transfers can be used to discuss self-interest, fairness, and generosity. The basic version offers one or ten rounds with fixed or reassigned partners. The extended version adds taking, earned endowments, third-party punishment, social information, identity, efficiency, two recipients, and observability.
Address: dictator.beer-lab.org
Two-Level Diplomacy and Domestic Ratification
International bargaining and domestic constraints. Basic: One encounter; ten fixed-group rounds; ten rematched rounds retaining positions. Extended: Six-round reference and ten institutional comparisons developed in chapters 3–5.
Address: diplomacy.beer-lab.org
Disposition effect
Relate gain realization, historical references and selling decisions. Basic: One date; eight dates with chosen sales; eight with liquidation and repurchase. Extended: Reference plus seventeen extensions of information, presentation, prospects, costs, taxes, orders and management.
Address: disposition.beer-lab.org
Continuous Double Auction
One market for the whole class: buyers and sellers with private values and costs trade one unit per period in real time, posting prices and accepting the best opposing offer (Smith, 1962). One period or eight periods, plus an extended version with chat.
Address: doubleauction.beer-lab.org
Double Marginalization
Understand how successive markups raise final price and reduce sales and joint profit. Basic: One interaction, ten fixed-partner rounds, and ten reassigned-partner rounds in Spanish and English. Extended: Alternating positions, integration, wholesale cap, two-part tariff, retailer offer, demand uncertainty, and distribution cost.
Address: doublemarginalization.beer-lab.org
Sanctions, Concessions, and Economic Coercion
Separate demand, threat, imposed sanction, concession, and withdrawal; examine how costs and outside options affect economic coercion. Basic: One encounter, ten encounters with a fixed pair, or ten encounters with pair reassignment. Each actor starts with 100 ECU. Extended: Damage restitution, higher sender cost, coalition support, third-party evasion, and separate government and population accounts.
Address: economic-coercion.beer-lab.org
Economic Growth and Capital Accumulation
Understand how saving turns current output into investment, how investment changes future capital, and why an economy faces a tradeoff between current and sustainable consumption. Basic: One decision; ten periods with low initial capital; or ten periods with high initial capital. Extended: Benchmark, high depreciation, population growth, productivity takeoff, capital destruction, low-capital trap, AK technology, and golden-rule information.
Address: economicgrowth.beer-lab.org
Two-Candidate Election
Two candidates choose policy positions and voters support the candidate closest to their preferences, allowing the class to study convergence, differentiation, and the median voter. The basic version offers one or ten elections with fixed or reassigned electorates. The extended version introduces policy-motivated candidates, polarization, valence, hidden preferences, public polls, costly voting, and two-dimensional competition.
Address: election.beer-lab.org
Electoral Entry and Citizen Candidates
Study costly entry, representation, and elections Basic: One encounter, ten fixed, ten reassigned, in ES/EN Extended: Fifteen treatments per language; 36 configurations and 4 rooms overall
Address: electoralentry.beer-lab.org
Electoral Systems and Strategic Voting
Compare how electoral rules and information transform preferences and ballots into collective outcomes. Basic: One election; ten with a fixed electorate; ten with rematching and stable individual preferences. Extended: Basic modes, a six-election reference, runoff, approval, Borda, public composition, intention polls, and proportional representation with or without a threshold.
Address: electoralrules.beer-lab.org
Authoritarian Survival and Elite Pacts
Study how a leader distributes resources to sustain a coalition and how elites coordinate support, challenge, and succession under different institutions. Basic: One interaction, ten rounds with a fixed group and succession, or ten independent rounds with rematching. Extended: Control, communication, private offers, council veto, elected succession, and a coercive apparatus.
Address: elitesurvival.beer-lab.org
Emergence of Money and Media of Exchange
Explain how objects not desired for consumption can facilitate later exchange. Basic: One encounter, ten fixed-pair encounters, or ten randomly rematched encounters. Extended: Eleven conditions per language including the reference: costs, information, networks, horizon, and tokens.
Address: emergenceofmoney.beer-lab.org
Endowment Effect and WTP/WTA Gap
Participants act as buyers, sellers, or neutral choosers and value or exchange a good, allowing comparisons of willingness to pay, willingness to accept, and trading rates. The basic version combines hypothetical valuation, incentivized valuation, and exchange. The extended version changes possession, reference prices, information, ownership expectations, experience, mechanism training, and market reconstruction.
Address: endowment.beer-lab.org
Equity Issuance and Price Formation
Understand primary issuance, cash ownership and subsequent price formation. Basic: One market; ten with a fixed group or random reassignment preserving roles. Extended: Fifteen placement, information, lock-up, financing and public-history conditions.
Address: equityissuance.beer-lab.org
Escalation and Shared Risk
Examine how continuation in a crisis exposes both actors to shared risk and how different exit institutions affect escalation. Basic: One crisis; ten crises with a fixed partner; or ten crises with partner reassignment between crises. Every crisis can contain up to five internal steps. Extended: Constant risk, structured communication, asymmetric consequences, a rising cost of backing down, negotiated exit, and emergency mediation.
Address: escalation.beer-lab.org
Anomalies of Expected Utility Theory
Batteries of individual lottery decisions that test the independence axiom, choice under ambiguity, the reduction of compound lotteries and dependence on the elicitation procedure. One completed decision is drawn at random and valuations use the BDM rule. An Allais module, an Ellsberg module or both, plus an extended version (reflection, common ratio, isolation, calibration, preference reversal and a full 17-decision diagnostic).
Address: eutanomalies.beer-lab.org
Evidence, Deliberation and Collective Decisions
Examine evidence aggregation, errors, and collective decision rules. Basic: One case, ten cases with fixed panels, or ten with reassignment. Extended: Eleven variants of rules, messages, error costs, sources, reliability, and review.
Address: evidencejury.beer-lab.org
Exchange and General Equilibrium
Connect exchange, resource constraints, distribution and price coordination. Basic: One interaction, ten rounds with fixed partners, or ten with random reassignment. Extended: Sixteen treatments varying endowments, preferences, information, fees, constraints, proposal rights and prices.
Address: exchange.beer-lab.org
Executive, Legislature, and Parliamentary Confidence
Examine how tenure, confidence, agenda, veto, chambers, elections, and coalitions shape approval and distribution of a public budget. Basic: One round with fixed tenure; six rounds with fixed tenure; six rounds with optional confidence. Extended: Nine conditions: benchmark, optional or mandatory confidence, open agenda, veto, parliamentary and presidential packages, bicameralism, and observable coalition.
Address: executivelegislature.beer-lab.org
Inflation Expectations Lab
Understand feedback, learning, and inflation forecast accuracy. Basic: One interaction; ten periods with a fixed group; ten periods with reassignment across economies. Extended: Twenty-period reference and ten useful extensions, with fixed groups.
Address: expectationslab.beer-lab.org
Expected Utility and Risk Attitudes
Each student privately chooses between sure amounts and lotteries, and one completed decision is selected at random for payment. The basic version offers a focal choice or a ten-item certainty-equivalent list in fixed or random order. The extended version adds Holt–Laury lists, high stakes, random order, an Eckel–Grossman lottery menu, and an insurance choice.
Address: expectedutility.beer-lab.org
Expert Information, Popularity and Reelection
Connect private information, policy choice, and continuation Basic: One encounter; ten with fixed or reassigned groups Extended: Eleven configurations per language
Address: expertinformation.beer-lab.org
Externalities and Regulation
Four firms with heterogeneous production and clean-technology costs choose how much to produce and how many clean units to use; the remaining units create an environmental damage shared by the community. Allows comparing the unregulated outcome with different regulatory rules.
Address: externalities.beer-lab.org
Federalism, Autonomy, and Territorial Inequality
Six participants form three regions and choose local investment and contributions to a shared fund. Compare regional or central voting, unequal resources, equalizing transfers, self-financed credit, bailout requests, external guarantees, and mobility with limited places. The report shows investment and contribution distributions, regional earnings, loan financing, and actual regional moves. Basic: One interaction or ten rounds with a fixed group or rematching. Extended: Eight treatments lasting six rounds with a fixed group.
Address: federalism.beer-lab.org
Financial Crisis and Real-Sector Transmission
Trace liquidation, bank capital and cash, new credit, firm investment and output. Basic: One episode; ten fixed-group episodes; ten episodes with role-preserving reassignment. Extended: Reference and fifteen contrasts of shocks, constraints, composition, protection, support tools, exposure, output and information.
Address: financialcrisis.beer-lab.org
Fiscal Capacity Investment and Political Turnover
Study how political continuity and the distribution of returns shape current investment in fiscal capacity. Basic: One encounter, four encounters with a fixed pair and rotating roles, or four encounters with reassignment and rotating roles. Extended: Benchmark, likely turnover, inclusive benefits, secure government, persistent capacity, external finance, political competition, and discretionary use.
Address: fiscalcapacity.beer-lab.org
Fishery with Quotas
Four fishers with different costs choose catches in a dynamic fishery and face harvesting rights or limits defined by the institution. The basic version offers one or ten seasons with fixed or reassigned groups. The extended version compares individual and collective quotas, conservative and permissive limits, adaptive adjustment, transferable or auctioned quotas, and imperfect enforcement.
Address: fisheryquotas.beer-lab.org
Framing Effects
Participants receive different formulations of an equivalent problem, and the system compares choices across frames while holding the relevant economic structure constant. The basic version includes the Asian disease problem, gains and losses, and attribute frames. The extended version adds risky choice, goals, public policy, joint or separate presentation, order, percentages versus frequencies, and diagnostic batteries.
Address: framing.beer-lab.org
Futures Market (Hedging)
Producers and processors hold opposite exposures to an uncertain final price and trade, in a continuous market, promises to buy and sell that are cash-settled at the end of the period (selling short is allowed). Shows how trading lets people hedge a risk they already hold. One period or 8 periods, plus an extended version with chat.
Address: futuresmarket.beer-lab.org
Gift Exchange Game
The firm chooses a wage and the worker, after observing it, chooses effort: the firm earns 100 + 20e - w and the worker 30 + w - c(e). One round or ten rounds with a fixed or a reassigned partner, plus an extended version (nonbinding effort request, structured communication, exogenous wage, minimum wage, discretionary bonus, costly punishment, high or low productivity, social information, observable outcomes).
Address: giftexchange.beer-lab.org
Grit and Long-Term Goals
Address: grit.beer-lab.org
Growth Mindset
Measure beliefs about intelligence malleability and teach self-report scoring. Basic: Published three-item SPARQ/Dweck form, administered once. Extended: Published six-item Dweck/Blackwell form, without administering the basic form beforehand.
Address: growthmindset.beer-lab.org
Heuristics and Belief Formation
Students answer individual judgment and probability problems to observe how salient information, descriptions, anchors, and sequences affect beliefs. The basic version covers representativeness, availability, and anchoring. The extended version adds small samples, the gambler's fallacy, Bayesian updating, conjunction, confirmation, calibration, and hindsight, as well as core and full diagnostic batteries.
Address: heuristics.beer-lab.org
HEXACO and Economic Decisions
Address: hexaco.beer-lab.org
Hiring Market
Holt's classroom version (Veconlab, "Statistical Discrimination"; Fryer, Goeree and Holt, 2005) of the Coate and Loury (1993) model. Half the class decide whether to pay to train; the other half hire after seeing a colour (green or purple, with no other content) and a noisy test. The colours are identical, yet a belief about one colour can confirm itself. One round or 10 rounds, plus extended versions.
Address: hiringmarket.beer-lab.org
Hospital-Resident Matching
Compare mechanisms that assign people to institutions when both sides have preferences or priorities and a price cannot clear the market. Basic: Applicant-proposing deferred acceptance; one round, ten fixed-market rounds, or ten reassigned markets. Extended: Immediate acceptance, program-proposing DA, serial dictatorship, truncated lists, unequal capacities, and aligned preferences.
Address: hospitalmatching.beer-lab.org
Hotelling Spatial Competition
Study how firms selling a homogeneous product choose location and, in selected treatments, price when consumers compare delivered cost. Basic: One round, ten rounds with the same rival, or ten rounds with reassignment; common price and uniform demand. Extended: Concentrated demand, endogenous prices, quadratic travel costs, an outside option, asymmetric costs, and sequential location.
Address: hotelling.beer-lab.org
Hyperinflation, Money and Seigniorage
Address: hyperinflation.beer-lab.org
ICAR Cognitive Reasoning
Teach cognitive performance measurement, scoring and limits of inference. Basic: Original 2014 ICAR-16: four items in each of four types. Extended: Original ICAR-60: 9 series, 16 verbal, 11 matrix and 24 rotation items. Each person receives one form.
Address: icar.beer-lab.org
Identity and Belief Formation
Randomly assigned group labels support comparisons of decisions toward people sharing or differing in group identity. Includes resource allocation in one encounter or ten rounds with fixed or reassigned pairs, and extensions on trust, third-party sanctions and contact through conversation or a matched quiet pause. An individual module elicits beliefs and contrasts source identity and desirable outcomes. The report separates transfers, returns, sanctions and belief accuracy. Basic: One round; ten with fixed groups; ten with rematching. Extended: 10 configurations per language, including controls.
Address: identitybeliefs.beer-lab.org
Information Cascades
Show how people combine private signals with other people's public choices and why agreement may emerge even when private information is not fully aggregated. Basic: One sequence; ten sequences with a fixed group; ten sequences with reassigned groups. Extended: Nine variants covering history, transparency, precision, beliefs, information acquisition, conformity, and correction.
Address: informationcascade.beer-lab.org
Collective Information and Deliberation
Five members receive signals about an unknown state and vote for an alternative; the collective outcome determines their payoffs. Includes one decision, ten rounds with fixed or reassigned committees, and extensions on unanimity, heterogeneous precision, structured messages, conversation, public signals, correlated signals and conflicting objectives, plus an individual control. The report distinguishes collective accuracy, signal use, messages, state-specific errors and payoffs without treating a signal as a preference. Basic: One round; ten with fixed groups; ten with rematching. Extended: 11 configurations per language, including controls.
Address: informationvoting.beer-lab.org
Political Blocking of Innovation
Explain why an authority may block a productive improvement threatening the rent associated with office. Basic: One encounter; ten with a fixed group; ten with random reassignment. Extended: Nine conditions: benchmark, protected continuity, low or high office value, guarantee, promise, competition, and two uncertainty conditions.
Address: innovationblocking.beer-lab.org
Insolvency, Priority, and Creditor Distribution
Compare distribution rules and reorganization approval among creditors with different claims. Basic: One case; ten with fixed groups or rematching with stable roles. Extended: 9 conditions, including the reference; ten cases.
Address: insolvency.beer-lab.org
Insurance Market
People with private risks decide whether to buy coverage, while the composition of those who insure determines costs, premiums, and market sustainability. The basic version offers one or ten rounds with fixed or reassigned markets. The extended version compares community rating, risk-based premiums, mandatory insurance, subsidies, penalties, reinsurance, experience-rated renewal, and a larger share of high-risk participants.
Address: insurance.beer-lab.org
Interest Groups, Mobilization and Electoral Information
Study verifiable information for policy and electorate selection Basic: Conditional information: one encounter, ten fixed, ten reassigned Extended: 23 treatments per language; 52 configurations and 4 rooms overall
Address: interestgroups.beer-lab.org
Investment Coordination and Demand Expectations
Examine how expectations about other companies affect investment profitability and joint activity. Basic: One interaction; ten periods with a fixed group; ten periods with reassigned groups. Extended: Benchmark and nine treatments: plans, public number, private information, public information, low or high productivity, temporary or permanent financed credits, and delayed results.
Address: investmentcoordination.beer-lab.org
Competitive Labor Market
Firms and workers participate in a labor market where offers, costs, and productivity determine hiring, wages, surplus, and unemployment. The basic version offers one or ten rounds with fixed or reassigned markets. The extended version compares binding and nonbinding minimum wages, unemployment insurance, demand expansions or contractions, full information, and a minimum wage combined with insurance.
Address: labormarket.beer-lab.org
Job Search and the Beveridge Curve
Connect search, vacancies, separations, and unemployment with the Beveridge curve. Basic: One interaction; ten persistent periods; ten independent encounters with reassignment. Extended: Fifteen-period reference and thirteen parameter or institutional extensions.
Address: laborsearch.beer-lab.org
Legal Rules and Coordination
Examine how announcements, information, and execution guide coordination. Basic: One encounter, ten encounters with a fixed partner, or ten with reassigned partners; no announcement. Extended: Eleven configurations: priority, authority, private information, stability, reversal, conflicting criteria, and execution.
Address: lawcoordination.beer-lab.org
Legal and Fiscal Capacity
Connect legal and fiscal capacity to private investment and an endogenous tax base. Basic: One encounter, ten with fixed pairs, or ten with reassignment; positions remain fixed. Extended: Nine conditions: reference, inherited capacities, costs, partial coverage, appropriation, alternative activity, persistence, and turnover.
Address: legalfiscal.beer-lab.org
Legitimacy, Procedures, and Consent
Study how the origin of a rule, voice, social information, preference congruence, review, and representation relate to cooperation. Basic: One interaction, ten periods with a fixed group, or ten periods with reassigned groups. Extended: Benchmark, voice, individual information, congruence, appeal, and representation by lot.
Address: legitimacy.beer-lab.org
Market for Lemons
Sellers know the quality of their goods and buyers decide how much to pay under complete or incomplete information, so the selection of goods offered can reduce trade. The basic version includes an individual diagnosis and markets lasting one or ten rounds. The extended version compares disclosure, quality standards, certification, warranties, reputation, and different shares of low-quality goods.
Address: lemons.beer-lab.org
Leverage and Margin
Distinguish leverage, collateral constraints, liquidation and creditor recovery. Basic: One account; three initial-margin cases in fixed or random order. Extended: Thirteen conditions covering funding, collateral, execution and reserve rights.
Address: leverage.beer-lab.org
Accident Prevention and Civil Liability
Understand how liability, information and coverage affect prevention and risk allocation. Basic: No liability: one round, ten fixed-partner rounds or ten reassigned-partner rounds. Extended: Seven mechanisms and ten presets, including the reference and internal comparisons.
Address: liability.beer-lab.org
Strategic Entry and Limit Pricing
Strategic entry, limit pricing, asymmetric information, commitment, reputation, and competition policy. Basic: One round, ten periods with a fixed pair, and ten periods with reassigned counterparts under complete information. Extended: Complete information, hidden type, cheap mimicry, high entry cost, subsidy, capacity, reputation, and antitrust rule.
Address: limitpricing.beer-lab.org
Locus of Control (IE-4)
Explore internal and external control beliefs using IE-4 and distinguish them from action-outcome contingencies. Basic: Four IE-4 statements; published English and an unvalidated Spanish teaching translation. Extended: Same scale and four original hypothetical choices with positive, zero and negative contingencies.
Address: locuscontrol.beer-lab.org
Integrated Economy: Labor, Production and Credit
Connect decisions and accounts in a closed economy Basic: One period; ten periods; twenty households Extended: Reference and thirteen mechanism changes
Address: macro-economy.beer-lab.org
Enter or Stay Out
Classroom version of the market-entry game (Meyer et al., 1992; Holt, Veconlab): in fixed groups of 10, each person chooses to enter a market paying 100 − 10 × (entrants) or to stay out for 50. In equilibrium 4 or 5 enter, but the group would be better off with 2 or 3. One round or 10 rounds, plus versions with a fixed or voted entry fee.
Address: marketentry.beer-lab.org
Matrices and Abstract Reasoning
Address: matrices.beer-lab.org
Matrix Games
Two participants choose actions simultaneously and their payoffs depend on the combination shown in a matrix, allowing the class to study best responses, coordination, conflict, and mixed strategies. The basic version includes Bach–Stravinsky, Matching Pennies, Stag Hunt, Rock–Paper–Scissors, MinMax, and Hide and Seek. The extended version adds communication, losses, aggregate history, focal labels, and instructor-configurable matrices.
Address: matrixgames.beer-lab.org
Mental Accounting and Narrow Bracketing
Each student makes individual choices that show how people separate money, outcomes, and budgets into mental accounts even when total value is equivalent. The basic version compares integration and segregation, a lost ticket, and sunk costs. The extended version adds narrow bracketing, mental budgets, labeled income, transaction utility, payment timing, house money, and hedonic editing.
Address: mentalaccounting.beer-lab.org
Market Microstructure and Orders
Understand how orders, reservations, execution and information shape liquidity and prices. Basic: One market; ten periods with fixed groups; ten with reassignment. Extended: Fifteen conditions: order types, tick, execution fees, depth visibility, finite liquidity supply, prior, signals, exact information, disclosure, trading restrictions, visible types and inventory targets.
Address: microstructure.beer-lab.org
Minimum-Effort Game
Group members choose effort simultaneously and the common outcome depends on the lowest effort, creating multiple equilibria and strategic uncertainty. The basic version offers one or ten rounds with fixed or reassigned groups. The extended version changes group size, costs, information, communication, recommendations, growth, and incentives to study equilibrium selection and path dependence.
Address: minimumeffort.beer-lab.org
Economic Model Building
Construct, register, evaluate and revise models using artificial data. Basic: Supplied data, one-cycle exploration and three-cycle revision. Extended: Thirteen extensions concerning information, functional form, environment, costs and economic applications.
Address: modelbuilding.beer-lab.org
Monetary Policy and Central Banking
Understand how expectations, shocks, and stabilization objectives shape a central bank's interest-rate decision. Basic: One period, ten periods with the same economy, or ten periods with reassigned economies. Extended: Dual or inflation mandate, Taylor-type rule, demand and supply shocks, lower bound, hidden target, and forward guidance.
Address: monetarypolicy.beer-lab.org
Money Creation and the Banking System
Understand deposit creation, payment settlement and credit constraints through decisions and reconciled balance sheets. Basic: One cycle; ten with a fixed lending relationship; ten with relationships reassigned within the economy. Extended: Reference and nine extensions on payments, cash, risk, liquidity, interbank funding, rates, demand, capital and reserves.
Address: moneycreation.beer-lab.org
Money Illusion and Price Adjustment
Distinguish nominal representation, expectations, and price adjustment after an announced scale change. Basic: One interaction; ten fixed-group periods; ten rematched periods. Nominal display. Extended: Sixteen conditions per language: eight nominal/real pairs, including the reference.
Address: moneyillusion.beer-lab.org
Monopoly and Price Discrimination
Understand how a firm with market power chooses prices and how profit, quantity, surplus, and deadweight loss respond to that choice. Basic: Uniform pricing with complete information for one or ten decisions, plus ten decisions with demand discovery. Extended: First-, second-, and third-degree price discrimination; resale; a price cap; and a higher marginal cost.
Address: monopoly.beer-lab.org
Local Markets and Trade
Holt's classroom game (Veconlab): markets of one seller and four buyers, with posted prices. With the market isolated, the seller's best price is the monopoly price (70, four units); when trade opens at a shipping cost, competition between markets pushes prices toward the competitive range (45–50). One local round or 10 rounds, plus versions with expensive shipping or chat among sellers.
Address: monopolytrade.beer-lab.org
Monty Hall
A participant chooses a door, observes the host reveal a losing option under a stated protocol, and decides whether to stay or switch. The basic version compares one decision with ten repetitions under immediate or delayed feedback. The extended version changes the number of doors, frequency formats, the host's information and protocol, reveal bias, and belief elicitation.
Address: montyhall.beer-lab.org
Moonlighting Game
A and B receive an endowment. A can transfer resources, which are multiplied for B, or take resources away; B then chooses whether to return, do nothing, or pay for costly punishment. The basic version offers one or ten rounds with fixed or reassigned partners. The extended version adds nonbinding agreements, random actions, contingent responses, and asymmetric endowments to separate reciprocity, intentions, and inequality.
Address: moonlighting.beer-lab.org
Multilateral Bargaining
Committee members receive a proposal for dividing a budget and vote under a collective rule; rejection leads to another proposal and may impose delay costs. The basic version offers one or ten negotiations with fixed or reassigned committees. The extended version compares majority, unanimity, supermajority, biased recognition, a persistent proposer, veto power, and structured communication.
Address: multilateralbargaining.beer-lab.org
Feedback frequency and investment
Connect evaluation, commitment and investment under risk. Basic: Nine periods; revise every three; three feedback calendars. Extended: Reference and twenty contrasts in institutions, presentation and opportunities.
Address: myopicloss.beer-lab.org
Ordering under Uncertain Demand
Classroom version of the newsvendor problem (Schweitzer and Cachon, 2000; Holt, Veconlab): each person decides alone how many units to order before demand is known, and leftovers are worth nothing. Orders are compared with the critical-fractile optimum under a high or low margin; the classic result is that orders lean toward mean demand. One round or 10 rounds, plus versions in which the cost changes.
Address: newsvendor.beer-lab.org
New Trade Theory and Market Integration
Understand production scale, variety, market integration and operating decisions by firms with different costs. Basic: One decision; five conditions in fixed order; the same five conditions in individual random order. Extended: Eighteen comparisons covering integration, consolidation, market size, costs, productivity, shipping, support, sunk costs, variety and learning.
Address: newtrade.beer-lab.org
Options and exercise decisions
Relate exercise rights, waiting value and terminal wealth. Basic: One contract; three strikes in fixed or individually randomized order. Extended: Baseline and twenty-two contrasts of rights, information, costs, valuation and hedging.
Address: options.beer-lab.org
Patents and Licensing
Each participant controls a technology and chooses a charge for its use. An automated firm needs complementary licenses and adjusts output to their combined cost. Extensions compare negotiated package licensing, substitutes, fixed fees, charge limits, three owners, demand, production costs, limited duration and cross-licensing between producing firms. The report separates decisions, transfers, output, prices and surplus. Basic: One interaction; ten rounds with fixed partners; ten rounds with random reassignment. Extended: The three basic modes plus sixteen distinct teaching treatments.
Address: patents.beer-lab.org
Mediation, Verification, and Peace Guarantees
Examine when third-party recommendation facilitates agreement and how information, bias, verification, guarantees, and withdrawal change bargaining. Basic: One encounter, ten rounds with a fixed group, or ten rounds with rematched groups while roles remain fixed. Extended: Neutral recommendation, observation without recommendation, biased incentive, private information, compliance verification, own-resource guarantee, and voluntary withdrawal.
Address: peacemediation.beer-lab.org
Multi-Unit Permit Auction
Multi-unit auction based on the design of the RGGI emission-permit auctions (Holt et al., 2007; Goeree et al., 2010; Holt, Veconlab): in fixed auctions of 6, each person wants up to 3 permits with decreasing values. It shows demand reduction under a uniform price against the discriminatory auction. One round or 8 rounds, plus extended versions with an ascending clock or with chat.
Address: permitauction.beer-lab.org
Bilateral Haggling Market (Pit Market)
Same private-value market as the double auction but with no public price: each person haggles privately, one to one, with anyone on the other side and may keep several negotiations open (Holt, 1996). One period or eight periods, plus an extended version with chat.
Address: pitmarket.beer-lab.org
Platforms and Market Design
Compare counterpart search and intermediation, distinguishing coverage, gains, stability, and costs. Basic: One round; ten with a fixed market; ten with random reassignment retaining side and characteristic. Extended: Full directory, sizes, deadlines, segmentation, information, recommendations, three algorithms, short lists, fees, outside option, unequal sides, and complementarity.
Address: platforms.beer-lab.org
Plea Bargaining and Admissions of Responsibility
Compare agreements, imperfect evidence, and review safeguards to separate procedural savings from attribution errors. Basic: One case; ten with fixed groups or rematching with stable roles. Extended: 9 conditions, including the reference; ten cases.
Address: pleabargaining.beer-lab.org
Diversification and Portfolio Choice
Connect composition, correlation and portfolio risk. Basic: One portfolio; three correlations in fixed or random order. Extended: Reference and sixteen economic and information contrasts.
Address: portfolio.beer-lab.org
Posted-Offer Market
Each seller posts a take-it-or-leave-it price without seeing the others; buyers then see all prices and choose whom to buy from. Same private-value market as the double auction, to contrast institutions (Ketcham, Smith and Williams, 1984). One period or eight periods, plus an extended version with chat.
Address: postedoffer.beer-lab.org
Power Shifts and Commitment
Study intertemporal bargaining, power shifts, preventive conflict, and commitment technologies. Basic: One encounter, ten encounters with a fixed pair, or ten encounters with reassigned partners. Extended: Fifteen treatments covering power, enforcement, advances, investment, continuation risk, discounting, and costs.
Address: powercommitment.beer-lab.org
Precedent, Interpretation, and Judicial Consistency
Examine reference following, consistency on repeated facts, and revision in an individual case battery. Basic: One file; ten-file battery in fixed or randomized order. Extended: 8 conditions, including the reference; ten cases.
Address: precedent.beer-lab.org
Information (Prediction) Market
Each person gets a private, noisy clue about a hidden outcome (A or B) and a security paying 100 ECU if A occurs is traded in a continuous market. Shows whether the price gathers the information scattered across the class, compared with the value given all clues together. One period or 8 periods, plus an extended version with chat.
Address: predictionmarket.beer-lab.org
Price Controls
One continuous double auction for the whole class with induced values and costs: after some free periods a price ceiling below equilibrium, a nonbinding ceiling above it, or a price floor applies (Isaac and Plott, 1981; Smith and Williams, 1981). The extended version adds storage: advance purchases ahead of a supply shock, a price ceiling or its removal (Castro Méndez and Martinelli, 2026).
Address: pricecontrols.beer-lab.org
Principal–Agent
Understand how contracts, information, and risk determine participation, effort, performance, and surplus distribution. Basic: One interaction, ten rounds with a fixed partner, and ten rounds with reassigned partners, in English and Spanish. Extended: Observable effort, flat wage, noisy outcome, high outside option, monitoring, unlimited liability, and discretionary bonus.
Address: principalagent.beer-lab.org
Prisoner's Dilemma
Both players choose simultaneously whether to cooperate: 60–60 if both cooperate, 0–100 if they differ, 20–20 if neither does. One or ten rounds, plus an extended version (communication, sequential moves, strategy method, high temptation, uncertain horizon, implementation error, costly punishment, social information, observable decisions, community framing).
Address: prisoners.beer-lab.org
Private-Value Auction
Each bidder receives a private value and submits offers for an object; the allocation and payment rule determines incentives, revenue, and efficiency. The basic version uses first price over one or ten rounds with fixed or reassigned markets. The extended version compares second price, an English auction, ascending and descending clocks, a reserve price, and public feedback.
Address: privateauction.beer-lab.org
Private Information, Signals, and Intelligence
Study how private disagreement costs, exogenous evidence, chosen signals, and reported beliefs affect bargaining. Basic: One encounter; ten encounters with a fixed partner; ten encounters with reassigned partners, in both languages. Extended: Fourteen additional conditions, including two controls: disclosure, signal quality and observability, messages, expenditure, bilateral costs, paid beliefs, base rates, and certain disagreement.
Address: privateinformation.beer-lab.org
Hearing, Reasons, and Procedural Justice
Compare hearing, explanation, review and authority in an individual administrative resolution. Basic: One encounter, ten encounters with a fixed group, or ten with reassignment. Extended: Twelve conditions, including the common control: hearing, explanation, discretion, correction, consistency and reviewer selection.
Address: procedure.beer-lab.org
Production, Entry, and Exit
Understand how competition, costs, and expectations determine production, entry, exit, and long-run profit. Basic: One interaction, ten fixed-market rounds, and ten reassigned-market rounds in Spanish and English. Extended: Heterogeneous costs, demand uncertainty, sunk setup cost, entry barrier, outside option, binary entry, and nonbinding announcements.
Address: productionentryexit.beer-lab.org
Property, Bargaining, and Transaction Costs
Relate initial entitlements, bargaining, and resources. Basic: One encounter; ten with fixed or reassigned partners. Extended: Thirteen ten-encounter configurations.
Address: propertyrights.beer-lab.org
Prospect Theory and Loss Aversion
Each student makes individual choices between sure outcomes and lotteries defined around a reference point, allowing the class to study gains, losses, and probability weighting. The basic version measures loss aversion and the fourfold pattern. The extended version changes reference points, sensitivity, and narrow or joint evaluation; one completed decision is selected at random for payment.
Address: prospecttheory.beer-lab.org
Protest, Concessions, and Citizen Coordination
Understand how concessions, costs, and expectations about other people affect collective action and its outcome. Basic: One interaction; ten fixed-group rounds; ten rematched rounds with stable roles. Extended: Six-round reference; communication; targets of two or four members; random additional cost; private or public individual costs; selective transfers.
Address: protest.beer-lab.org
Public Debt, Consumption and Generations
Compare current and future tax finance and examine when saving or transfers offset a change in financing. Basic: Two calendars; four income profiles in fixed order; four profiles in random order. Extended: Borrowing constraints, rate spreads, tax risk, accounting support, temporal preferences, zero interest and generation institutions.
Address: publicdebt.beer-lab.org
Public Goods Game
Groups of four: each member receives 100 ECU and decides how much to contribute to a common fund that returns 0.5 ECU per ECU to everyone. One or ten rounds with fixed or reassigned groups, plus an extended version (communication, high or low return, provision threshold, punishment, reward, leadership, social information, take frame, conditional contributions).
Address: publicgoods.beer-lab.org
Quota Controls
Basic version: the whole class trades in a continuous double auction; after three free-market periods (the benchmark) quantity is restricted: a market-wide quota filled first come, first served, or selling licences drawn at random among sellers. Students see the price rise, the quota rent and who captures it, and the efficiency loss from lower quantity and from misallocation. Extended version: only buyers are human, facing automated sellers; the quota is allocated by a uniform-price auction, a discriminatory (pay-as-bid) auction or a licence lottery.
Address: quotacontrols.beer-lab.org
Inequality, Taxation and Redistribution
Study how income, risk, information, responsibility, and institutional design affect support for taxation and redistribution. Basic: One round, ten periods with a fixed group, and ten periods with reassigned groups. Extended: Benchmark, veil of ignorance, produced income, efficiency cost, high inequality, inequality information, progressive tax, and targeted transfer.
Address: redistribution.beer-lab.org
Reverse Reference-Price Auction
Holt's classroom version (Veconlab, "Reference Price Auctions"): a computer with a fixed budget buys large (reference 100) and small (40) items and ranks offers by offer / reference, as in a payment-for-conservation program. It compares being paid one's own offer with a uniform cutoff ratio (Cason and Gangadharan, 2005). One round or 8 rounds, plus extended versions without reference prices or with chat.
Address: referenceauction.beer-lab.org
Expectations, Goals, and Reference Points
Evaluation of the same outcome under different expectations, goals and evaluation of the same performance, and income expectations and effort (basic); near goal, savings goal, target income, self-set goal, goal difficulty, expectation information and multiple references (extended), plus core and full diagnostic.
Address: referencepoints.beer-lab.org
Credit relationships and reputation
Understand how continuity, information and enforcement affect repayment and credit access. Basic: One interaction; ten fixed rounds; ten rematched rounds without history. Extended: Reference and sixteen extensions; ten rounds except probabilistic continuation capped at twenty.
Address: relationshipcredit.beer-lab.org
Renewable Fishery
Four fishers choose how much to harvest from a shared resource whose stock regenerates between seasons; greater current extraction can reduce future productivity and income. The basic version offers one or ten seasons with fixed or reassigned groups. The extended version changes communication, discounting, ecological information, regeneration, environmental shocks, fish prices, and conservation rewards.
Address: renewablefishery.beer-lab.org
Rent Seeking and Influence
Four people spend resources in a contest for a prize; all pay their expenditure and winning probability depends on their share of total weighted spending. Includes one encounter, ten rounds with fixed or reassigned groups, and extensions on advantages, unequal budgets, spending caps, a highest-spending award and harm to a third party. The report presents expenditure distributions, dissipation, concentration of probabilities and payoffs by role. Basic: One round; ten with fixed groups; ten with rematching. Extended: 8 configurations per language, including controls.
Address: rentseeking.beer-lab.org
Reporting, Protection and Enforcement
Examine costly reporting, protection and rule enforcement, separating private incentives from compensation. Basic: One interaction, ten rounds with a fixed group, or ten rounds with reassignment. Extended: Rewards, costless reporting, retaliation, protection, imperfect evidence, two observers, shared rewards, two acting participants and leniency.
Address: reporting.beer-lab.org
Lawyers, Clients and Representation
Study settlement, incentives and information in legal representation. Basic: One case; ten cases with fixed groups; ten cases with reassigned groups. Extended: Seven treatments: procedure and recovery fees, private and direct quality information, delegation, legal aid and uncertain enforcement.
Address: representation.beer-lab.org
Risk, Return and Investment Allocation
Understand allocation between a safe return and financial risk. Basic: One choice or four independent scenarios, in fixed or random order. Extended: Reference and twelve comparisons of return, dispersion, wealth, background risk, and information.
Address: riskreturn.beer-lab.org
Social Punishment and Formal Sanctions
Distinguish an explicit norm, a formal sanction, and a social response; compare punishment and compensation. Basic: One interaction; ten rounds with a fixed group; ten rounds with reassignment. Extended: Twelve selectable treatments, including controls for norms, fines, social response, and a fourth participant.
Address: sanctions.beer-lab.org
Self-Control and Economic Choices (BSCS)
Explore self-reported self-control and its descriptive relationship with economic choices. Basic: Complete thirteen-statement BSCS in Spanish and English. Extended: The same BSCS followed by four hypothetical timing, commitment and distraction scenarios; controlled private feedback.
Address: selfcontrol.beer-lab.org
General Self-Efficacy and Performance Forecasts (GSE)
Explore general capability beliefs using GSE-10 and distinguish them from success forecasts and observed task performance. Basic: Complete ten-statement GSE in Spanish and English. Extended: Same GSE plus four original economic arithmetic problems, locked prior forecasts and controlled private feedback.
Address: selfefficacy.beer-lab.org
Bargaining, Settlement, and Litigation
Study bargaining, settlement, and litigation through a transfer and a costly dispute procedure. Basic: One case; ten cases with a fixed partner; ten with reassigned partners. Extended: Reference plus six mechanisms in eleven presets per language, each with ten cases.
Address: settlement.beer-lab.org
Social Choice and Agenda Power
Understand majority cycles, voting order, anticipation, and institutional rights. Basic: One tournament; six balanced agendas; ten fixed or rematched tournaments. Extended: Public preferences, agenda chooser and control, majority, veto, unanimity, amendments, and single peaks.
Address: socialchoice.beer-lab.org
Social Norms Game
Each participant rates, on a four-category scale, how socially appropriate each of A's eleven possible actions is. One action is drawn for the whole session and matching the group's modal category pays 5 ECU. The rated decisions are hypothetical: nobody allocates ECU. The extended version adds the give-or-take and the opt-out contexts.
Address: socialnorms.beer-lab.org
Specific Factors and Labor Mobility
Allocate labor across sectors with fixed specific resources; compare production, wages, resource income, relative prices, real returns and mobility constraints. Basic: One allocation, five price scenarios in fixed order, or the same five scenarios in individual random order. Extended: Relative and general prices; specific resources; labor supply; productivity; immobility; moving costs, limits and support; consumption baskets; international migration; ten-decision learning.
Address: specificfactors.beer-lab.org
Stackelberg Duopoly
Understand how an observable output commitment changes best responses, price, profits, and welfare in a duopoly. Basic: One interaction, ten rounds with the same partner, and ten rounds with reassignment. Extended: Simultaneous Cournot, alternating leadership, endogenous timing, imperfect observation, asymmetric costs, and constrained capacity.
Address: stackelberg.beer-lab.org
State Formation and Property Protection
Study how production, appropriation, and private defense interact with collective institutions that protect property rights. Basic: One interaction, ten rounds with a stable group, or ten rounds with random rematching. Extended: Supplemental-endowment control, imposed protection, elected protection, extracting authority, stable authority, exogenous replacement, and competing authorities.
Address: stateformation.beer-lab.org
Surveys and Polls
Students answer single- or multiple-choice questions, scales, numbers, or open text individually and anonymously, and the instructor receives aggregate distributions that can guide the class. The basic version offers a quick learning pulse, an exit ticket, and an economic prediction; the extended version adds mixed polls, concept checks, and open-ended feedback.
Address: surveys.beer-lab.org
Systematic Risk and Asset Pricing
Connect state-contingent payoffs, supply-weighted aggregate risk and traded asset prices. Basic: One market; ten fixed-group markets; ten reassigned markets. Extended: Twelve reference, information, cost, supply, exposure, short-sale and safe-return conditions.
Address: systematicrisk.beer-lab.org
Bid for an Object of Hidden Value
Classroom version of the "acquiring a company" problem (Samuelson and Bazerman, 1985; Holt, Veconlab). In pairs, the seller knows the object's value and the buyer, to whom it is worth 1.5 times as much, makes a single offer. Because only offers covering the value are accepted, every positive offer loses on average (buyer's curse). One round or 10 rounds with a role switch, plus extended versions.
Address: takeover.beer-lab.org
Tax Compliance and Audits
Study how tax rates, audits, penalties, institutional information, and nonmonetary motivations affect income reporting. Basic: One decision; ten periods with feedback; ten periods with end-only feedback. Extended: Benchmark, high audit, high penalty, high rate, fiscal return, transparency, norm information, and responsive enforcement.
Address: taxcompliance.beer-lab.org
Taxation, Services and the Social Contract
Explain the relation between voluntary tax declarations, government provision and fiscal reciprocity. Basic: One round; ten rounds with fixed group; ten with reassignment preserving roles. Extended: Ten conditions per language, six rounds: reference, binding provision, strong audits, two revenue origins, two information rules, elections and two histories.
Address: taxcontract.beer-lab.org
Electoral Rules and Territorial Spending
Connect competition, allocation, and representation Basic: One election; ten fixed or reassigned periods Extended: Eleven institutional configurations per language
Address: territorialspending.beer-lab.org
Time Preferences
Study dated choices, discounting, switch points, dynamic consistency, present bias, magnitude, delay, and sign effects, convex allocations, and commitment demand. Basic: One choice, a fixed ten-choice list, or the same list in randomized order. Extended: Three baseline variants and six treatments: present bias, magnitude, delay length, sign, convex time budget, and commitment.
Address: timepreferences.beer-lab.org
Treaties and Global Public Goods
Study international cooperation under common risk, pledges, inequality and productive access. Basic: One block or ten blocks with fixed groups or reassignment across blocks. Extended: Twelve treatments of information, pledges, risk, inequality, transfers and access.
Address: treaties.beer-lab.org
Trust Game
Player 1 decides how much of 100 ECU to send, the amount is tripled and player 2 decides how much to return. One or ten rounds, plus an extended version (strategy method, earned endowment, communication, variable or private multiplier, social information, reputation, costly punishment, role reversal, observable outcomes).
Address: trust.beer-lab.org
Voter Turnout and Abstention
Voters from two groups decide whether to pay the cost of participating or abstain, and the outcome depends on how many votes each side mobilizes. The basic version offers one or ten elections with fixed or reassigned electorates. The extended version changes the electoral margin, voting cost, civic duty, compulsory voting, public polls, mobilization, and electorate size.
Address: turnout.beer-lab.org
Ultimatum Game
A proposes a split of the endowment and B accepts or rejects it; if B rejects, both get zero. One or ten rounds, plus an extended version (strategy method, earned endowment, communication, outside option, impunity, mini-ultimatum, asymmetric and social information, observable decisions, role reversal).
Address: ultimatum.beer-lab.org
Irrigation Permit Auction
Procurement auction based on the Georgia irrigation reduction auction (Cummings, Holt and Laury, 2004; Holt, Veconlab): the state wants to retire 40% of the acres from irrigation with a fixed budget and buys the lowest offers per acre. Each period has 3 to 5 bidding rounds with provisional results; only the last, unannounced one counts. One or four periods, plus extended versions.
Address: waterauction.beer-lab.org