Template-Type: ReDIF-Paper 1.0
Author-Name: Giacomo Bonanno
Author-Name-First: Giacomo
Author-Name-Last: Bonanno
Author-Workplace-Name: Department of Economics, University of California Davis
Title: A Syntactic Approach to Rationality in Games
Abstract: We consider strategic-form games with ordinal payoffs and provide a syntactic analysis of common belief/knowledge of rationality, which we define axiomatically. Two axioms are considered. The first says that a player is irrational if she chooses a particular strategy while believing that another strategy is better. We show that common belief of this weak notion of rationality characterizes the iterated deletion of pure strategies that are strictly dominated by pure strategies. The second axiom says that a player is irrational if she chooses a particular strategy while believing that a different strategy is at least as good and she considers it possible that this alternative strategy is actually better than the chosen one. We show that common knowledge of this stronger notion of rationality characterizes the restriction to pure strategies of the iterated deletion procedure introduced by Stalnaker (1994).
Length: 22
File-URL: https://repec.dss.ucdavis.edu/files/r7n8cTxKRAPX57QZKRG79CRP/07-1.pdf
File-Format: application/pdf
Number: 247
Classification-JEL: 
KeyWords: rationality, common belief, rationalizability, dominated strategies, game logic, frame characterization
Creation-Date: 20070126
Handle: RePEc:cda:wpaper:247