A comparative analysis of spatial Prisoner's Dilemma experiments: conditional cooperation and payoff irrelevance.
We have carried out a comparative analysis of data collected in three experiments on Prisoner's Dilemmas on lattices available in the literature. We focus on the different ways in which the behavior of human subjects can be interpreted, in order to empirically narrow down the possibilities for behavioral rules. Among the proposed update dynamics, we find that the experiments do not provide significant evidence for non-innovative game dynamics such as imitate-the-best or pairwise comparison rules, whereas moody conditional cooperation is supported by the data from all three experiments. This conclusion questions the applicability of many theoretical models that have been proposed to understand human behavior in spatial Prisoner's Dilemmas. A rule compatible with all our experiments, moody conditional cooperation, suggests that there is no detectable influence of interaction networks on the emergence of cooperation in behavioral experiments.
1] Complexity & Networks Group and Department of Mathematics, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK [2] Grupo Interdisciplinar de Sistemas Complejos (GISC), Departamento de Matemáticas, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Madrid, Spain.
Jelena
J
Grujić
Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Campus Río Ebro, 50018 Zaragoza, Spain.
Carlos
C
Gracia-Lázaro
Department of Evolutionary Ecology, Max-Planck-Institute for Evolutionary Biology, Plön, Germany.
Manfred
M
Milinski
1] Department of Evolutionary Ecology, Max-Planck-Institute for Evolutionary Biology, Plön, Germany [2] Courant Research Center "Evolution of social behavior", University of Göttingen, Plön, Germany.
Dirk
D
Semmann
Research Group for Evolutionary Theory, Max-Planck-Institute for Evolutionary Biology, Plön, Germany.
Arne
A
Traulsen
1] Grupo Interdisciplinar de Sistemas Complejos (GISC), Departamento de Matemáticas, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Madrid, Spain [2] Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Campus Río Ebro, 50018 Zaragoza, Spain.
José A
JA
Cuesta
Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Campus Río Ebro, 50018 Zaragoza, Spain.
Yamir
Y
Moreno
1] Grupo Interdisciplinar de Sistemas Complejos (GISC), Departamento de Matemáticas, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Madrid, Spain [2] Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Campus Río Ebro, 50018 Zaragoza, Spain.
Angel
A
Sánchez
D003299:Cooperative Behavior; D005716:Game Theory; D006801:Humans; D007398:Interpersonal Relations