Preference Manipulations Lead to the Uniform Rule

21 Pages Posted: 12 Aug 2008

See all articles by Olivier Bochet

Olivier Bochet

New York University Abu Dhabi

Toyotaka Sakai

Yokohama National University

Date Written: April 6, 2008

Abstract

In the division problem with single-peaked preferences, it is well known that the uniform rule is robust to strategic manipulation. Furthermore, under efficiency and symmetry, it is the unique strategy-proof rule (Sprumont, 1991; Ching, 1994). We conversely analyze the consequences of strategic manipulation for a wide class of rules. Given a rule, we interpret its associated direct revelation game as a manipulation game, and we characterize its equilibrium allocations. We establish a strong connection between outcomes of manipulation and the uniform rule itself. For every rule that belongs to the class, the uniform allocation (i) is the unique strong Nash equilibrium allocation and the unique Pareto-efficient Nash equilibrium allocation, and (ii) is the unique Nash equilibrium allocation under an additional strict monotonicity condition. Thus, attempts to manipulate each of our rule lead to the recommendation made by the uniform rule. A by-product of our results is the identification of a large class of direct revelation mechanisms that doubly implement the uniform rule in Nash and strong Nash equilibria.

Suggested Citation

Bochet, Olivier and Sakai, Toyotaka, Preference Manipulations Lead to the Uniform Rule (April 6, 2008). Available at SSRN: https://ssrn.com/abstract=1220394 or http://dx.doi.org/10.2139/ssrn.1220394

Olivier Bochet (Contact Author)

New York University Abu Dhabi ( email )

PO Box 129188
Abu Dhabi
United Arab Emirates

HOME PAGE: http://https://sites.google.com/site/obochet2/

Toyotaka Sakai

Yokohama National University ( email )

United States