Directed Search and Competitive Search Equilibrium: A Guided Tour
综述了定向搜索与竞争性搜索均衡的理论与应用，强调其与传统搜索理论和一般均衡理论的异同，并分析了私有信息与异质性下的分类问题。
This essay surveys the literature on directed search and competitive search equilibrium, covering theory and a variety of applications. These models share features with traditional search theory, but also differ in important ways. They share features with general equilibrium theory, but with explicit frictions. Equilibria are often efficient, mainly because markets price goods plus the time required to get them. The approach is tractable and arguably realistic. Results are presented for finite and continuum economies. Private information and sorting with heterogeneity are analyzed. While emphasizing issues and applications, we also provide several hard-to-find technical results.