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61 UCLA L. Rev. 2 (2013-2014)

handle is hein.journals/uclalr61 and id is 1 raw text is: Against Endowment Theory: Experimental
Economics and Legal Scholarship
Gregory Klass
Kathryn Zeiler
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, one finds appeals to a generic endowment effect throughout the legal
literature. 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.
AUTHORS
Gregory Klass is Professor of Law and Associate Dean of Research and Academic
Programs, Georgetown University Law Center. Kathryn Zeiler is Professor of Law,
Georgetown University Law Center. Many provided insightful comments on this
and earlier drafts, including Robert Ahdieh, Jack Beermann, Gregg Bloche, Richard
Craswell, Heidi Li Feldman, Matthew Gerke, James Griener, Vicki Jackson, Donald
Langevoort, David Luban, John Mikhail, Alison Morantz, William Park, Eduardo
Pefialver, Charles Plott, Jedediah Purdy, Warren Schwartz, Michael Seidman, Matthew
Stephenson, Christian Turner, and Robin West. We also received helpful comments
from law school workshop participants at Boston University, Cornell University, Emory
University, George Mason University, Georgetown University, Harvard University,
Hebrew University, HEC Montreal, the University of Bologna, the University of
Michigan, the University of North Carolina, the University of Paris, the University of
Pennsylvania, Stanford University, and the Federal Trade Commission. We received
stellar research assistance from Stacy Goto, Carl Hinneschiedt, Sophia Lee, Louis
Rosenberg, and Joseph Shifer.

61 UCLA L. REV. 2 (2013)

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