Imagine I think there are 200 balls in the urn, but Robin Hanson thinks there are 300 balls in the urn. Once Robin tells me his estimate, and I tell him mine, we should converge upon a common opinion. In essence his opinion serves as a “sufficient statistic” for all of his evidence.
My comments were intended to suggest that the results of going through an Aumann agreement exchange could quite be different from what you would get if the parties shared all their relevant evidence.
The main similarity is that the parties end up agreeing with each other in both cases.
That wasn’t intended. Earlier, I cited this.
http://www.marginalrevolution.com/marginalrevolution/2005/10/robert_aumann_n.html
My comments were intended to suggest that the results of going through an Aumann agreement exchange could quite be different from what you would get if the parties shared all their relevant evidence.
The main similarity is that the parties end up agreeing with each other in both cases.