Agreeing to Disagree. Aumann, R. J. *The Annals of Statistics*, 4(6):1236–1239, November, 1976. Cited by 2035Paper doi abstract bibtex Two people, 1 and 2, are said to have common knowledge of an event E if both know it, 1 knows that 2 knows it, 2 knows that 1 knows is, 1 knows that 2 knows that 1 knows it, and so on. THEOREM. If two people have the same priors, and their posteriors for an event A are common knowledge, then these posteriors are equal.

@article{aumann_agreeing_1976,
title = {Agreeing to {Disagree}},
volume = {4},
copyright = {Copyright © 1976 Institute of Mathematical Statistics},
issn = {0090-5364},
url = {http://www.jstor.org/stable/2958591},
doi = {10.2307/2958591},
abstract = {Two people, 1 and 2, are said to have common knowledge of an event E if both know it, 1 knows that 2 knows it, 2 knows that 1 knows is, 1 knows that 2 knows that 1 knows it, and so on. THEOREM. If two people have the same priors, and their posteriors for an event A are common knowledge, then these posteriors are equal.},
number = {6},
urldate = {2013-07-31},
journal = {The Annals of Statistics},
author = {Aumann, Robert J.},
month = nov,
year = {1976},
note = {Cited by 2035},
pages = {1236--1239},
}

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