抄録
In the situations like a voluntary contribution game or a common resource game, agents will have a conflict of interests. However, they may attempt to communicate for cooperation. These strategic and cooperative situations are observable in many cases. In this paper, we consider the strategic situation in which each agent is permitted to communicate under uncertainty. Especially, we consider the public goods game which includes a voluntary contribution game and a common resource game. The purpose of this paper is to clarify the existence of ex ante a-core strategies in public goods games.
Moreover, we prove that the payoff of each player under the fine information is higher than the private information. This may be considered as a virtue of communication.
