Natural Implementation with Partially Honest Agents

The paper proposes necessary and suffi cient conditions for the natural implementation of (efficient) social choice correspondences (SCCs) in pure finite exchange economies when some of the agents are partially honest. A partially honest agent is an agent who strictly prefers to tell the truth when lying has no better material consequences for her. Firstly, it is shown that if there is even one partially honest agent in the economy (and the planner does not know her identity), then any SCC is Nash implementable by a natural price-allocation mechanism. Secondly, and in sharp contrast with the results of conventional models of natural implementation, it is shown that the equivalence relationship between natural price-allocation mechanisms and natural price-quantity2 mechanisms no longer holds. Finally, and even more strikingly, the paper reports that the class of implementable SCCs by natural price-quantity mechanisms is significantly enlarged.

Institute of Economic Research, Hitotsubashi University

2012-02

English(eng)

technical report

VoR

AA11476336

38

Discussion paper series / Institute of Economic Research, Hitotsubashi University

https://hdl.handle.net/10086/22175