Back to Fundamentals: Equilibrium in Abstract Economies
American Economic Review
vol. 105,
no. 8, August 2015
(pp. 2570-94)
Abstract
We propose a new abstract definition of equilibrium in the spirit of competitive equilibrium: a profile of alternatives and a public ordering (expressing prestige, price, or a social norm) such that each agent prefers his assigned alternative to all lower-ranked ones. The equilibrium operates in an abstract setting built upon a concept of convexity borrowed from convex geometry. We apply the concept to a variety of convex economies and relate it to Pareto optimality. The "magic" of linear equilibrium prices is put into perspective by establishing an analogy between linear functions in the standard convexity and "primitive orderings" in the abstract convexity. (JEL C90, D11)Citation
Richter, Michael, and Ariel Rubinstein. 2015. "Back to Fundamentals: Equilibrium in Abstract Economies." American Economic Review, 105 (8): 2570-94. DOI: 10.1257/aer.20140270Additional Materials
JEL Classification
- C90 General
- D11 Consumer Economics: Theory