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Viable Nash Equilibria: Formation and Sustainability

Speaker
Ehud Kalai
Date
14/01/2020 - 13:00 - 11:30Add To Calendar 2020-01-14 11:30:00 2020-01-14 13:00:00 Viable Nash Equilibria: Formation and Sustainability To be viable, a Nash equilibrium should deter the defection of groups of players. For a newly proposed equilibrium to be viable, it should deter defections but also have a reasonable likelihood of formation. To assess the viability of equilibria, we study a defection-deterrence index D that describes the size of defection groups that an equilibrium is sure to deter, and a dual index of formation difficulty, F (= n - D), that describes the critical size of groups that guarantee equilibrium formation. These viability indices are compatible with observations in behavioral economics and with functioning social systems, and offer a tool for assessing the performance of proposed equilibria. Faculty Lounge, Building 504, First Floor אוניברסיטת בר-אילן - המחלקה לכלכלה Economics.Dept@mail.biu.ac.il Asia/Jerusalem public
Place
Faculty Lounge, Building 504, First Floor
Affiliation
Northwestern University
Abstract

To be viable, a Nash equilibrium should deter the defection of groups of players. For a newly proposed equilibrium to be viable, it should deter defections but also have a reasonable likelihood of formation. To assess the viability of equilibria, we study a defection-deterrence index D that describes the size of defection groups that an equilibrium is sure to deter, and a dual index of formation difficulty, F (= n - D), that describes the critical size of groups that guarantee equilibrium formation. These viability indices are compatible with observations in behavioral economics and with functioning social systems, and offer a tool for assessing the performance of proposed equilibria.

תאריך עדכון אחרון : 23/10/2019