Spillovers in Industrial Districts
研究工业区中企业间社会互动如何影响就业调整，发现相似且地理邻近的企业间存在信息溢出，导致调整的放大和聚集。
We study the role of social interaction (SI) in determining firms' employment adjustments in industrial districts. We assume that SI matters only among firms that are both similar and geographically close. Our first test of this assumption is based on the correlation between individual and aggregate measures of employment adjustments. Exploiting the richness of our data, we directly address the problems of self-selection and unobserved common shocks that plague most of the empirical literature. Our second test shows that, as theory predicts, spillovers give rise to amplified responses to shocks and bunching of adjustments. This gives further support to the role of SI in industrial clusters and suggests that information spillovers, according to which firms' actions convey useful information about a common problem, are one of the channels through which they take place.