Credible implementation

Bhaskar Chakravorty, Luis C. Corchón, Simon Wilkie

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)


The theory of implementation abounds with mechanisms with intricate systems of rewards and punishments off-the-equilibrium path. Generally, it is not in the designer's best interest to go through with the reward/punishment in the "subgame" arising from some disequilibrium play. This would make the mechanism's outcome function non-credible. We define a notion of credible implementation and, in the domain of exchange economies, we show that (a) the non-dictatorial Pareto correspondence can be credibly implemented (b) there is no credibly implementable Pareto-efficient and individually rational social choice rule (SCR) and (c) there is no credibly implementable Pareto-efficient and envy-free SCR. We derive necessary and sufficient conditions for credible implementability of SCR. The main implication is that it is sub-optimal for the designer to be endowed with "too much" information about the economy. Finally, we show that the negative results persist under weaker credibility requirements.

Original languageEnglish
Pages (from-to)18-36
Number of pages19
JournalGames and Economic Behavior
Issue number1
Publication statusPublished - Oct 2006
Externally publishedYes


  • Commitment
  • Credibility
  • Implementation
  • Renegotiation

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