Ultimatum Game
Also known as: Ultimatum Bargaining, Division Game
The Ultimatum Game is a two-player economic decision-making task that reveals preferences for fairness and social norms. One player (proposer) receives money and offers a portion to a second player (responder). The responder accepts or rejects the offer; if accepted, both receive their share; if rejected, both receive nothing. Economic theory predicts responders should accept any positive offer (better than zero), yet responders often reject unfair offers. This gap between predictions and behavior reveals that fairness concerns, equity sensitivity, and social punishment shape economic decisions.
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When to use it
Use the Ultimatum Game when studying fairness preferences, social norms, economic decision-making, or cultural variation. It is valuable in behavioral economics (understanding deviations from rational economic models), cultural psychology (examining how societies differ in fairness values), neuroscience (neural bases of fairness judgments), and clinical research (understanding impaired social decision-making).
Strengths & limitations
- Reveals real preferences: rejections cost money, demonstrating that fairness concerns are genuine, not merely hypothetical
- Cross-cultural replicable: played successfully in diverse societies worldwide, enabling study of cultural differences in cooperation
- Neural accessibility: neuroimaging reveals brain regions (insula, prefrontal cortex) responding to unfair offers, mapping emotions and cognition
- Theoretically generative: gap between economic predictions and actual behavior spurned decades of research on social preferences and behavioral economics
- Artificial laboratory setting: real-world negotiations involve reputational concerns, repeated interaction, and uncertainty absent in the lab; findings may not generalize
- Responder behavior influenced by proposer beliefs: responders must infer whether offers reflect intentional unfairness or external constraints; misattributions can distort responses
- Monetary amounts matter: ultimatum game behavior changes with stakes; small stakes (a few dollars) produce different patterns than large stakes (weeks' wages)
- Limited to binary accept/reject: does not capture the full spectrum of negotiation or communication possible in real bargaining
Frequently asked
Why do rational economic actors reject unfair offers?
Standard rational choice theory assumes people maximize money; rejecting zero dollars is irrational. However, people care about fairness and punishment of norm violation. Rejecting unfair offers is rational if fairness (or revenge) is intrinsically valued. Behavioral economics expanded rationality to include social preferences.
Does responder behavior change if proposals are made by computers versus people?
Yes, substantially. When responders believe computers generated offers, rejection rates drop despite identical unfairness. Responders interpret human offers as reflecting intentions; they punish intentional unfairness more harshly. This reveals that fairness judgments are partly about attributions of intent, not just outcomes.
How do stakes affect ultimatum game behavior?
With small stakes (a few dollars), rejection rates are higher; with large stakes (weeks' wages), responders accept more unfair offers. Fairness concerns remain, but at higher stakes, forgone money outweighs fairness concerns. Fairness is real but not infinite; it is outweighed by sufficiently large monetary differences.
What is the difference between the Ultimatum Game and the Dictator Game?
Ultimatum Game: proposer makes an offer; responder accepts/rejects. If rejected, both get zero. Dictator Game: proposer decides allocation with no responder approval needed. Dictator game reveals generosity without punishment threat; often, proposers give nothing. Ultimatum game reveals fairness preferences given responders can punish.
Sources
- Güth, W., Schmittberger, R., & Schwarze, B. (1982). An experimental analysis of ultimatum bargaining. Journal of Economic Behavior & Organization, 3(4), 367-388. DOI: 10.1016/0167-2681(82)90011-7 ↗
- Henrich, J., Boyd, R., Bowles, S., et al. (2005). 'Economic man' in cross-cultural perspective: Behavioral experiments in 15 small-scale societies. Behavioral and Brain Sciences, 28(6), 795-855. DOI: 10.1017/S0140525X05000142 ↗
- Sanfey, A. G., Rilling, J. K., Aronson, J. A., Nystrom, L. E., & Cohen, J. D. (2003). The neural basis of economic decision-making in the ultimatum game. Science, 300(5626), 1755-1758. DOI: 10.1126/science.1082976 ↗
How to cite this page
ScholarGate. (2026, June 3). Ultimatum Game. ScholarGate. https://scholargate.app/en/psychology/ultimatum-game
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- Dictator GamePsychology↔ compare