Working Papers by Tatsuyoshi Saijo
Showing 1 to 4 of 4 records.
# | Title | Authors | Date | Length | Paper | Abstract | |
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1174 | Secure Implementation: Strategy-Proof Mechanisms Reconsidered | Saijo, Tatsuyoshi Sjostrom, Tomas Yamato, Takehiko | 09/01/2003 | 31 pages | wp1174.pdf | Strategy-proofness, requiring that truth-telling is a dominant strategy, is a standard concept in social choice theory. However, the concept of strategy-proofness has serious drawbacks. First, announcing one's true preference may not be a unique dominant strategy, and using the wrong dominant strategy may lead to the wrong outcome. Second, almost all strategy-proof mechanisms have a continuum of Nash equilibria, and most of which produce the wrong outcome. Third, experimental evidence shows that most of the strategy-proof mechanisms do not work well. We argue that a possible solution to this dilemma is to require double implementation in Nash equilibrium and in dominant strategies, which we call secure implementation. We characterize environments where secure implementation is possible, and compare it with dominant strategy implementation. An interesting example of secure implementation is a Groves mechanism when preferences are single-peaked. | |
1170 | Strategy-Proof Sharing | Mizukami, Hideki Saijo, Tatsuyoshi Wakayama, Takuma | 08/01/2003 | 25 pages | wp1170.pdf | We consider the problem of sharing a good, where agents prefer more to less. In this environment, we prove that a sharing rule satisfies strategy-proofness if and only if it has the quasi-constancy property: no one changes her own share by changing her announcements. Next by constructing a system of linear equations, we provide a way to find all of the strategy-proof sharing rules, and identify a necessary and sufficient condition for the existence of a non-constant, strategy-proof sharing rule. Finally, we show that it is only the equal sharing rule that satisfies strategy-proofness and symmetry. | |
1165 | Secure Implementation Experiments: Do Strategy-Proof Mechanisms Really Work? | Cason, Timothy N. Saijo, Tatsuyoshi Sjostrom, Tomas Yamato, Takehiko | 05/01/2003 | 50 pages | wp1165.pdf | ||
1154 | Non-Excludable Public Good Experiments | Saijo, Tatsuyoshi Yamato, Takehiko Yokotani, Konomu Cason, Timothy N. | 12/01/2002 | wp1154.pdf |