Lehrer, Ehud; Samet, Dov - In: Theoretical economics : TE ; an open access journal in … 6 (2011) 2, pp. 269-287
Aumann has shown that agents who have a common prior cannot have common knowledge of their posteriors for event $E$ if … common knowledge that the posteriors for $E$ \emph{do} coincide? We show that a necessary and sufficient condition for this … is the existence of a nonempty \emph{finite} event $F$ with the following two properties. First, it is common knowledge …