ESSAY BOUNDED RATIONALITY AND THE THEORY OF PROPERTY Oren Bar-Gill and Nicola Persico* Abstract Strong, property rule protection – implemented via injunctions, criminal sanctions and supercomepnsatory damages – is a defining aspect of property. What is the theoretical justification for property rule protection? The conventional answer has to do with the alleged shortcomings of the weaker, liability rule alternative: It is widely held that liability rule protection – implemented via compensatory damages – would interfere with efficient exchange and jeopardize the market system. We show that these concerns are overstated and that exchange efficiency generally obtains in a liability rule regime. But only when the parties are perfectly rational. When the standard rationality assumption is replaced with a more realistic, bounded rationality assumption, liability rules no longer support exchange efficiency. Bounded rationality thus emerges as a foundational element in the theory of property. * Bar-Gill: William J. Friedman and Alicia Townsend Friedman Professor of Law and Economics, Harvard Law School (email:
[email protected]); Persico: Professor of Managerial Economics and Decision Sciences, Kellogg School of Management (email:
[email protected]). We thank Ronen Avraham, Omri Ben-Shahar, Oliver Board, Rick Brooks, Ryan Bubb, Peter DiCola, Richard Epstein, Lee Fennell, Clay Gillette, David Gilo, Howell Jackson, Louis Kaplow, Lewis Kornhauser, Saul Levmore, Anup Malani, Yoram Margalioth, Roger Myerson, Dotan Oliar, Gideon Parchomovsky,