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搜寻摩擦下降、失业与增长

Declining Search Frictions, Unemployment, and Growth
Journal of Political Economy · 2020 · Paolo Martellini、Guido Menzio

中文摘要

针对一个劳动力市场的搜寻理论模型,我们探寻平衡增长路径(BGP)存在的条件:在生产技术与搜寻技术不断改进的情况下,失业率、职位空缺率与工人转换率保持不变。BGP 存在的充分必要条件是:企业—工人匹配属于检验品(inspection goods),且匹配质量服从帕累托分布。搜寻摩擦的下降会对增长做出贡献,其强度由帕累托分布的尾部系数决定。我们提出了一种测度搜寻摩擦下降速率及其对增长之贡献的策略。

Abstract

For a search-theoretic model of the labor market, we seek conditions for the existence of a balanced growth path (BGP), where unemployment, vacancy, and worker’s transitions rates remain constant in the face of improvements in the production and search technologies. A BGP exists iff firm-worker matches are inspection goods and the quality of a match is drawn from a Pareto distribution. Declining search frictions contribute to growth with an intensity determined by the tail coefficient of the Pareto distribution. We develop a strategy to measure the rate of decline of search frictions and their contribution to growth.
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