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Discussion Papers: Takeshi Murooka, Takuro Yamashita “Optimal Trade Mechanisms with Adverse Selection and Inferential Mistakes”

September 14, 2021

No.DP-2021-E-006 (September 6,2021)

“Optimal Trade Mechanisms with Adverse Selection and Inferential Mistakes“

Takeshi Murooka
    Osaka School of International Public Policy (OSIPP), Osaka University
Takuro Yamashita
    Toulouse School of Economics, University of Toulouse

 

Abstract: We study an adverse selection environment, where a rational seller can trade a good of which she privately knows its value to a buyer, and there are gains from trade. The buyer’s types differ in their degree of inferential abilities: A rational type correctly infers the value of the good from the seller’s offer, whereas a naive type under-appreciates the correlation between the seller’s private information and offer. We characterize the optimal menu mechanism that maximizes the social surplus. Notably, no matter how severe the adverse selection is (in particular, even when no trade is the unique possible outcome if all agents are rational), all types of buyers trade in the optimal mechanism. The rational buyer’s trade occurs at the expense of the naive buyer’s losses. We also investigate a consumer-protection policy of limiting the losses and discuss its implications.

JEL Codes: D82, D86, D90, D91
Keywords: adverse selection, inferential naivety, mechanism design, behavioral contract theory,
consumer protection

 

OSIPP Discussin Papers のサイトへ

September 14, 2021by OSIPP Library

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