No SDES-2015-16
Title Isolating and identifying motivations: A voluntary contribution mechanism experiment with interior Nash equilibria
Author Takehisa Kumakawa, Tatsuyoshi Saijo and Takehiko Yamato
Abstract What motivates subjects in their decision making is a lingering issue in public goods experiments. Using a nonlinear payoff function and a two-subject model, we create a one-toone correspondence between contributions and motivations, enabling us to isolate and identify the following three possible motivations: Nash, cooperative, and altruistic motivations. The experimental results show that Nash- motivated behavior accounts for more than 70% of all decisions. Some subjects reveal a cooperative motivation when they know the other subject's payoff information. Altruistic motivation is found to be rare throughout the experiment.
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