Template-type: ReDif-Paper 1.0 Author-Name: Flesch, Janos Author-workplace-name: RS: GSBE Theme Conflict & Cooperation, QE Math. Economics & Game Theory Author-Name: Herings, P. Jean-Jacques Author-workplace-name: RS: GSBE Theme Data-Driven Decision-Making, RS: GSBE Theme Conflict & Cooperation, Microeconomics & Public Economics Author-Name: Maes, Jasmine Author-workplace-name: RS: GSBE Theme Conflict & Cooperation, Microeconomics & Public Economics Author-Name: Predtetchinski, Arkadi Author-workplace-name: RS: GSBE Theme Conflict & Cooperation, Microeconomics & Public Economics Title: Individual upper semicontinuity and subgame perfect ϵ-equilibria in games with almost perfect information Abstract: We study games with almost perfect information and an infinite time horizon. In such games, at each stage, the players simultaneously choose actions from finite action sets, knowing the actions chosen at all previous stages. The payoff of each player is a function of all actions chosen during the game. We define and examine the new condition of individual upper semicontinuity on the payoff functions, which is weaker than upper semicontinuity. We prove that a game with individual upper semicontinuous payoff functions admits a subgame perfect ϵ-equilibrium for every ϵ > 0, in eventually pure strategy profiles. Classification-JEL: c62,c65,c72,c73 Series: GSBE Research Memoranda Creation-Date: 20190114 Number: 002 File-URL: https://cris.maastrichtuniversity.nl/ws/files/32087642/RM19002.pdf File-Format: application/pdf File-Size: 761953 Handle: Repec:unm:umagsb:2019002 DOI: 10.26481/umagsb.2019002