LOCAL LABOR MARKETS, JOB MATCHING, AND URBAN LOCATION*
提出一种新模型，将工人技能空间与城市物理空间联系起来，分析企业如何利用这两个空间压低工资，并解释社会经济贫民窟的形成。
We present a new way of modeling local labor markets by linking the space of workers' skills and the physical space of cities. The key lesson of our analysis is that firms exploit workers in these two spaces by setting wages that are below the competitive level. The degree of monopsony power depends on the elasticity of the firm's labor pool, which is inversely related to the costs workers incur in commuting and acquiring skills. Our analysis thus shows how socioeconomic ghettos emerge as workers with poor skill matches are also those who incur the highest commuting costs.