We consider voluntarily separable repeated Prisoner's Dilemma in which a pair of players meet randomly and repeatedly play Prisoner's Dilemma only by mutual agreement. Fujiwara-Greve and Okuno-Fujiwara (2007) consider the case that once a partnership is dissolved there is no information flow to...

Unlike the ordinary repeated games, in the real world, people can run away after cheating. In this paper we construct a social game, in which players can repeat Prisoners' Dilemma only if both players agree to continue the partnership. We investigate how a social sanction prevents moral hazard...

We develop a general framework to analyze endogenous relationships. To consider relationships in the modern society, neither one-shot games nor repeated games are appropriatemodelsbecausethe formationand dissolutionofa relationship is not an option. We formulate voluntarily separable repeated...

We consider the voluntarily separable repeated Prisonerʼs Dilemma model in which players randomly meet and form pairs to repeatedly play Prisonerʼs Dilemma only by mutual agreement. While the literature has dealt with the case of no information flow across partnerships, we consider the case in...

Ordinary repeated games do not apply to real societies where one can cheat and escape from partners. We formulate a model of endogenous relationships that a player can unilaterally end and start with a randomly assigned new partner with no information flow. Focusing on two-person, two-action...

Ordinary repeated games do not apply to real societies where one can cheat and escape from partners. We formulate a model of endogenous relationships that a player can unilaterally end and start with a randomly-assigned new partner with no information flow. Focusing on two-person, two-action...

We extend the voluntarily separable repeated Prisoner's Dilemma (Fujiwara-Greve and Okuno-Fujiwara, 2009) to continuous actions. We show that there is a (constrained) efficient bimorphic equilibrium which is robust under evolutionary pressure. It consists of a cooperative strategy and a myopic...

Ordinary repeated games do not apply to real societies where one can cheat and escape from partners. We formulate a model of endogenous relationships that a player can unilaterally end and start with a randomly assigned new partner with no information flow. Focusing on two-person, two-action...

I study a business cycle model where agents learn about the state of the economy by accumulating capital. During recessions, agents invest less, and this generates noisier estimates of macroeconomic conditions and an increase in uncertainty. The endogenous increase in aggregate uncertainty...

We construct a continuous-type, three-tier agency model with hidden information and collusion ¨¤ la Tirole (1986, 1992), thereby providing a framework that can address the problem of the global pollution control. By extensively utilizing the Monotone Comparative Statics method, the First Order...