Bitte verwenden Sie diesen Link, um diese Publikation zu zitieren, oder auf sie als Internetquelle zu verweisen: https://hdl.handle.net/10419/227636 
Erscheinungsjahr: 
2020
Schriftenreihe/Nr.: 
Working Paper No. 2020-03
Verlag: 
Bar-Ilan University, Department of Economics, Ramat-Gan
Zusammenfassung: 
The solution concept of a Bayesian equilibrium of a Bayesian game is inherently an interim concept. The corresponding ex ante solution concept has been termed Harsányi equilibrium; examples have appeared in the literature showing that there are Bayesian games with uncountable state spaces that have no Bayesian approximate equilibria but do admit Harsányi approximate equilibrium, thus exhibiting divergent behaviour in the ex ante and interim stages. Smoothness, a concept from descriptive set theory, has been shown in previous works to guarantee the existence of Bayesian equilibria. We show here that higher rungs in the countable Borel equivalence relation hierarchy can also shed light on equilibrium existence. In particular, hyperfiniteness, the next step above smoothness, is a sufficient condition for the existence of Harsányi approximate equilibria in purely atomic Bayesian games.
Schlagwörter: 
Bayesian games
Equilibrium existence
Borel equivalence relations
Dokumentart: 
Working Paper

Datei(en):
Datei
Größe
345.71 kB





Publikationen in EconStor sind urheberrechtlich geschützt.