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Common Learning

Martin Cripps, Jeffrey Ely, George Mailath and Larry Samuelson
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Larry Samuelson: University of Wisconsin

No 1575, Cowles Foundation Discussion Papers from Cowles Foundation for Research in Economics, Yale University

Abstract: Consider two agents who learn the value of an unknown parameter by observing a sequence of private signals. The signals are independent and identically distributed across time but not necessarily agents. Does it follow that the agents will commonly learn its value, i.e., that the true value of the parameter will become (approximate) common-knowledge? We show that the answer is affirmative when each agent's signal space is finite and show by example that common learning can fail when observations come from a countably infinite signal space.

Keywords: Common learning; Common belief; Private signals; Private beliefs (search for similar items in EconPapers)
JEL-codes: D82 D83 (search for similar items in EconPapers)
Pages: 34 pages
Date: 2006-08
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Published in Econometrics (2008), 76(4): 909-933

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Journal Article: Common Learning (2008) Downloads
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