Secure Implementation -Theory and Experiments-

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Other Title
  • セキュア遂行―理論と実験―
  • セキュア スイコウ リロン ト ジッケン

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Abstract

Strategy-proofness, requiring that truth-telling be a dominant strategy, is a standard concept used in social choice theory. However, we argue that this concept has serious drawbacks. In particular, many strategy-proof mechanisms have a continuum of Nash equilibria, some of which produce the wrong outcome. A possible solution to this problem is to require double implementation in dominant strategy equilibria and in Nash equilibria, called secure implementation. We conducted experiments on two strategy-proof mechanisms. One of them is not secure with many bad Nash equilibria, whereas the other secure mechanism has a unique good Nash equilibrium. We observed subjects adopted dominant strategies significantly less often in the non-secure mechanism than in the secure mechanism.

Journal

  • 経済研究

    経済研究 58 (2), 122-135, 2007-04-25

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