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Jordan, Jillian J.Remove Jordan, Jillian J. →

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  • Article

No Unique Effect of Intergroup Competition on Cooperation: Non-competitive Thresholds Are as Effective as Competitions between Groups for Increasing Human Cooperative Behavior

By: Matthew R. Jordan, Jillian J. Jordan and David G. Rand
Explaining cooperation remains a central topic for evolutionary theorists. Many have argued that group selection provides such an explanation: theoretical models show that intergroup competition could have given rise to cooperation that is costly for the individual.... View Details
Keywords: Intergroup Competition; Threshold Public Goods Game; Multi-level Selection; Cooperation; Groups and Teams; Competition
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  • December 2016
  • Article

The Effects of Endowment Size and Strategy Method on Third Party Punishment

By: Jillian J. Jordan, Katherine McAuliffe and David G. Rand
Numerous experiments have shown that people often engage in third-party punishment (3PP) of selfish behavior. This evidence has been used to argue that people respond to selfishness with anger, and get utility from punishing those who mistreat others. Elements of the... View Details
Keywords: Third-party Punishment; Norm-enforcement; Strategy Method; Economic Games; Cooperation; Emotions; Fairness
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  • August 2, 2016
  • Article

Uncalculating Cooperation Is Used to Signal Trustworthiness

By: Jillian J. Jordan, Moshe Hoffman, Martin A. Nowak and David G. Rand
Humans frequently cooperate without carefully weighing the costs and benefits. As a result, people may wind up cooperating when it is not worthwhile to do so. Why risk making costly mistakes? Here, we present experimental evidence that reputation concerns provide an... View Details
Keywords: Social Evaluation; Experimental Economics; Moral Psychology; Cooperation; Reputation; Decision Making
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  • Article

Third-party Punishment as a Costly Signal of Trustworthiness

By: Jillian J. Jordan, Moshe Hoffman, Paul Bloom and David G. Rand
Third-party punishment (TPP), in which unaffected observers punish selfishness, promotes cooperation by deterring defection. But why should individuals choose to bear the costs of punishing? We present a game theoretic model of TPP as a costly signal of... View Details
Keywords: Third-party Punishment; Trustworthiness; Behavior; Trust; Game Theory
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  • 2015
  • Chapter

Why We Cooperate

By: Jillian J. Jordan, Alexander Peysakhovich and David G. Rand
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  • January 2015
  • Article

Costly Third-party Punishment in Young Children

By: Katherine McAuliffe, Jillian J. Jordan and Felix Warneken
Human adults engage in costly third-party punishment of unfair behavior, but the developmental origins of this behavior are unknown. Here we investigate costly third-partypunishment in 5- and 6-year-old children. Participants were asked to accept (enact) or reject... View Details
Keywords: Third-party Punishment; Inequity Aversion; Social Cognition; Cooperation; Fairness; Behavior
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  • Article

Heuristics Guide the Implementation of Social Preferences in One-Shot Prisoner's Dilemma Experiments

By: Jillian J. Jordan, Valerio Capraro and David G. Rand
Cooperation in one-shot anonymous interactions is a widely documented aspect of human behavior. Here we shed light on the motivations behind this behavior by experimentally exploring cooperation in a one-shot continuous-strategy Prisoner’s Dilemma (i.e. one-shot... View Details
Keywords: Human Behavior; Social Evolution; Behavior; Cooperation; Decision Making; Game Theory
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  • September 2, 2014
  • Article

Development of In-Group Favoritism in Children's Third-Party Punishment of Selfishness

By: Jillian J. Jordan, Katherine McAuliffe and Felix Warneken
When enforcing norms for cooperative behavior, human adults sometimes exhibit in-group bias. For example, third-party observers punish selfish behaviors committed by out-group members more harshly than similar behaviors committed by in-group members. Although evidence... View Details
Keywords: Ontogeny; Cooperation; Equality and Inequality
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  • Article

Contagion of Cooperation in Static and Fluid Social Networks

By: Jillian J. Jordan, David G. Rand, Samuel Arbesman, James H. Fowler and Nicholas A. Christakis
Cooperation is essential for successful human societies. Thus, understanding how cooperative and selfish behaviors spread from person to person is a topic of theoretical and practical importance. Previous laboratory experiments provide clear evidence of social... View Details
Keywords: Social Contagion; Social Networks; Cooperation; Behavior; Social Media
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  • Forthcoming
  • Article

Punitive but Discerning: Reputation Can Fuel Ambiguously-Deserved Punishment, but Does Not Erode Sensitivity to Nuance

By: Jillian J. Jordan and Nour Kteily
The desire to appear virtuous can motivate people to punish wrongdoers, a desirable outcome when punishment is clearly deserved. Yet claims that “virtue signaling” is fueling a culture of outrage suggest that reputation concerns may inspire even potentially unmerited... View Details
Keywords: Outrage; Signaling; Ideology; Moralistic Punishment; Reputation; Moral Sensibility
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