Document Type

Article

Publication Date

1-14-2014

ISSN

1943-1724

Publisher

University of California, Los Angeles, School of Law

Language

en-US

Abstract

Endowment theory holds the mere ownership of a thing causes people to assign greater value to it than they otherwise would. The theory entered legal scholarship in the early 1990s and quickly eclipsed other accounts of how ownership affects valuation. Today, appeals to a generic “endowment effect” can be found throughout the legal literature. More recent experimental results, however, suggest that the empirical evidence for endowment theory is weak at best. When the procedures used in laboratory experiments are altered to rule out alternative explanations, the “endowment effect” disappears. This and other recent evidence suggest that mere ownership does not affect willingness to trade or exchange. Many experimental economists no longer ascribe to endowment theory. Legal scholars, however, continue to rely on endowment theory to predict legal entitlements’ probable effects on expressed valuations. That reliance is no longer warranted. Endowment theory’s influence in legal scholarship provides important lessons about how legal scholars and policymakers should, and should not, use results from experimental economics.

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