We often see people procrastinate what should be done immediately. This propensity seems to be especially high in Japan as bad loans problem in 1990 exemplifies. Propcrastinations in collective decision making tend to occur when there are many stakeholders. They tend to waste time while trying...

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...

The purpose of the paper is twofold: One is to explain the concept of product architecture in the context of increasing complexity of artifacts; The other is to examine the condition under which the open-standard strategy is likely to be adopted. Dramatic decreases in mechanical information...

This paper analyzes a model of coordination where two agents attempt to coordinate their actions through communication. One agent (Sender) is engaged in finding the true state of nature in a stochastic environment and the action that best fits the state. The other agent (Receiver) in turn tries...

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...

When future international agreement on global environmental control is anticipated, decisions for controlling current carbon gas emissions by improving the country's abatement capabilities are strongly affected by the likelihood of such agreements as well as their probable outcome. We construct...

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...

We analyze the performance of the Japanese Economy in the last 30 years. We do so by emphasizing the fact that an economy is a social system and people are concerned with social values and norms. We point out that the employment security, which became socially guaranteed during the aftermath of...

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...

When future international agreement for global environmental control is anticipated, decisions for controlling current carbon gas emissions by improving the country's abatement capabilities are strongly affected by the likelihood of and the likely outcome of such agreements. We construct a two...