Document Type
Discussion Paper
Publication Date
8-1-2006
CFDP Number
1575
CFDP Pages
34
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.
Recommended Citation
Cripps, Martin W.; Ely, Jeffrey C.; Mailath, George J.; and Samuelson, Larry, "Common Learning" (2006). Cowles Foundation Discussion Papers. 1866.
https://elischolar.library.yale.edu/cowles-discussion-paper-series/1866