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The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm
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Cheating is evolutionarily assimilated with cooperation in the continuous snowdrift game.

Tatsuya Sasaki1, Isamu Okada2

  • 1Faculty of Mathematics, University of Vienna, 1090 Vienna, Austria; Evolution and Ecology Program, International Institute for Applied Systems Analysis (IIASA), 2361 Laxenburg, Austria.

Bio Systems
|April 15, 2015
PubMed
Summary

The continuous snowdrift game often leads to assimilation of cooperation levels, not diversity maintenance. This suggests gradual cooperative evolution can reduce social inequity and fairness conflicts in ventures.

Keywords:
Adaptive dynamicsEvolution of cooperationEvolutionary branchingReplicator dynamicsSnowdrift gameSpeciation in reverse

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Area of Science:

  • Evolutionary Game Theory
  • Behavioral Economics
  • Population Dynamics

Background:

  • The snowdrift game, unlike the Prisoner's Dilemma, typically supports coexisting cooperators and defectors.
  • Evolutionary branching in continuous snowdrift games theoretically predicts social diversification into extreme contribution levels (100% and 0%).
  • Limited research exists on the evolutionary dynamics and consequences of strategy diversity loss in these games.

Purpose of the Study:

  • To analyze continuous snowdrift games with quadratic payoffs in dimorphic populations.
  • To identify conditions promoting the merging of distinct cooperation levels into a single intermediate level.
  • To investigate the evolutionary consequences of strategy diversity in continuous snowdrift games.

Main Methods:

  • Game-theoretical analysis of continuous snowdrift games.
  • Modeling dimorphic populations with quadratic payoff functions.
  • Investigating evolutionary dynamics under gradual contribution changes.

Main Results:

  • Continuous snowdrift games are more prone to assimilating diverse cooperation levels than maintaining them.
  • Gradual evolution can lead populations with 100% and 0% contributors to merge into a single intermediate contribution level.
  • Loss of strategy diversity is a likely outcome in continuous snowdrift games.

Conclusions:

  • The continuous snowdrift game's evolutionary dynamics favor assimilation over diversity.
  • Gradual evolution of cooperative behavior may mitigate social inequity and fairness-based conflicts in joint ventures.
  • Findings challenge the expectation of stable diversity and highlight potential for social homogenization.