Supermodularity and preferences

• 成果类型: Article
• 署名作者: Chambers, Christopher P.; Echenique, Federico
• 署名单位: California Institute of Technology
• 刊物名称: JOURNAL OF ECONOMIC THEORY
• ISSN/ISSBN: 0022-0531
• DOI: 10.1016/j.jet.2008.06.004
• 发表日期: 2009
• 页码: 1004-1014
• 关键词: Complementarity; revealed preference; Afriat's theorem; Refutability

摘要

We uncover the complete ordinal implications of supermodularity on finite lattices under the assumption of weak monotonicity. In this environment, we show that supermodularity is ordinally equivalent to the notion of quasisupermodularity introduced by Milgrom and Shannon. We conclude that supermodularity is a weak property, in the sense that many preferences have a supermodular representation. (C) 2008 Elsevier Inc. All rights reserved.