We investigate implementation of social choice functions where the central planner has no knowledge about the detail of model specifications, and only a few individuals participate in the mechanism. In contrast with the standard model of implementation, each agent has non-consequential moral...

We investigate the adverse selection problem where a principal delegates multiple tasks to individuals. The individuals form a group as a single agent and share their private signals in order to maximize their average payoff. We characterize the virtually implementable social choice functions by...

This paper shows a detail-free idea of multi-object large double auction design in general trading environments, where the auctioneer randomly divides agents into two groups, and agents in each group trade at the market-clearing price vector in the other group. With private values, any dominant...

This paper introduces a new concept for full implementation that takes into account agents' preferences for understanding how the "process" works. We assume that the agents have an intrinsic preference for honesty in the sense that they dislike the idea of lying when it does not influence their...

This paper incorporates behavioral economics into implementation theory. We use mechanisms that are strictly detail-free. We assume that each agent dislikes telling a white lie when such lying does not serve her/his material interest. We present a permissive result wherein by using just a single...

This paper introduces a new concept of full implementation that takes into account agents? preferences for understanding how the process works. We assume that the agents have intrinsic preferences for honesty in the sense that they dislike the idea of lying when it does not influence their...

We investigate the finitely repeated prisoners' dilemma with explicit contractual devices. We show that full collusion can be achieved by incentivizing the players' final period of play with small fines. Our incentivizing modality is the penance contract, by which a player is penalized if (and...

This paper incorporates social psychology into implementation theory, where an uninformed principal manipulates a dynamic decision-making process without employing any tailored contractual device. We demonstrate the principal's mind-control method through which he can effectively utilize social...

This paper incorporates social psychology into implementation theory. Real individuals care not only about their material benefits but also about their social influence in terms of obedience and conformity. Using a continuous time horizon, we demonstrate a method of manipulating the...

We investigate the adverse selection problem where a principal delegates multiple tasks to an agent. We characterize the virtually implementable social choice functions by using the linking mechanism proposed by Jackson and Sonnenschein (2007) that restricts the message spaces. The principal...