@inproceedings{oai:barrel.repo.nii.ac.jp:00004844,
 author = {Namekata, Tsuneyuki and Namekata, Yoko},
 month = {Sep},
 note = {A player in a game sometimes does not fully understand the situation of the game. We regard him in this state as being indifferent to the game. He needs to experience the games some times in order to escape being indifferent to the game and to fully understand the situation of the game. It is also an important factor in his experience how other players deal with him when he is indifferent to the game. We model this situation into a Demographic Donor-Recipient game. We investigate their effect on the emergence of cooperation by Agent-Based Simulation. We observe the following main results under some reasonable assumptions by Agent-Based Simulation: (1) If indifferent players are supposed not to escape from being indifferent to the game, then the cooperation almost does not emerge. (2) If indifferent players are supposed to escape from being indifferent to the game by experiencing some number of games as a recipient and imitating their experience in a certain inner way, then the cooperation emerges more often. (3) Further, if compassionate recipients, faced with an indifferent donor, pay the cost of Cooperative move in order for the indifferent player to experience the Cooperative outcome, then the cooperation emerges more often. Thus we observe that the indifferent player’s imitation of his experience in the games and the compassionate player’s self-sacrificing move promote the cooperation., 18th Czech-Japan Seminar on Data Analysis and Decision Making under Uncertainty, Czech, September 19-22,2015},
 pages = {1--13},
 title = {The Effect of Indifference and Compassion on the Emergence of Cooperation in a Demographic Donor-Recipient Game},
 year = {2015}
}