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Explaining Fairness : Results from an Experiment in Guinea.

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Fair behavior in human societies, while seemingly counterintuitive to individual interests, is influenced by ethnic homogeneity and market integration. These factors, rather than reputation, appear to drive fairness in resource sharing experiments.

Keywords:
BehaviorCommon-pool resourceCross-cultural analysisExperimentFairness

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Area of Science:

  • Evolutionary psychology
  • Behavioral economics
  • Social anthropology

Background:

  • Fairness is a crucial human concept promoting societal cooperation, yet its evolutionary origins, which seem to contradict individual short-term interests, remain a puzzle.
  • Existing theories propose mechanisms like kin selection, group-beneficial norms, and partner choice with reputation to explain the evolution of fairness.
  • Understanding the drivers of fairness is essential for comprehending human social behavior and cooperation.

Purpose of the Study:

  • To investigate the factors influencing fair behavior in a human population using a common-pool resource game.
  • To test the hypotheses derived from evolutionary theories regarding the development of fairness.
  • To analyze the impact of ethnic homogeneity, market integration, group size, kinship, and reputation on fair sharing behavior.

Main Methods:

  • Conducted a common-pool resource game experiment involving participants from 37 multiethnic villages in Fouta Djallon, Guinea.
  • Collected data on sharing behavior within a subsistence agricultural population.
  • Analyzed the correlation between fair behavior and variables such as ethnic homogeneity, market integration, group size, kinship, and reputation.

Main Results:

  • Fair behavior in the resource sharing game increased with greater ethnic homogeneity and market integration.
  • Conversely, larger group size and stronger kinship ties were associated with decreased fair behavior.
  • Fairness was not found to be conditional on reputation; instead, populations varied in their ability to sustain fairness without reputational mechanisms.

Conclusions:

  • Evolutionary theory offers a valuable framework for understanding the complex phenomenon of fairness in human societies.
  • Ethnic and economic factors play a significant role in shaping fair behavior, potentially overriding individual self-interest.
  • The findings highlight the context-dependent nature of fairness and its evolutionary underpinnings.