Template-Type:ReDIF-Paper 1.0  
Title: Robust Possibility and Impossibility Results
Author-Name:  Schweizer, Urs
Classification-JEL:  D82 
Keywords:  Impossibility theorems, possibility theorems, Bayesian implementation under voluntary participation
Abstract: In a general setting of private information, the possibility (impossibility) theorem
	is said to be valid, if a balanced and ex post efficient mechanism exists (does not exist)
	which agents voluntarily participate at. Possibility and impossibility results are called
	robust if they hold for all priors with independently distributed private information. The
	following papers, among others, implicitely contain such results: Myerson and
	Satterthwaite (1983), Gth and Hellwig (1986), Cramton, Gibbons and Klemperer
	(1987), McAfee (1991), Makowski and Mezzetti (1993), Williams (1994) and Schmitz
	(1998). The present paper introduces a criterion which does not depend on the prior
	distribution of information. This criterion allows, not only, to simplify drastically earlier
	proofs, but also to generalize the existing results in a substantial way.
Length: pages
Creation-Date: 1998-12
Revision-Date: 
Handle: RePEc:bon:bonsfa:590
File-URL: http://www.wiwi.uni-bonn.de/bgsepapers/bonsfa/bonsfa590.pdf
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