How Disasters Affect Local Labor Markets
用广义双重差分法分析飓风对佛罗里达县工人收入的影响，发现受灾县收入最高增4%，邻县收入下降，且强飓风影响更大。
Abstract This study improves upon the Difference in Difference approach by examining exogenous shocks using a Generalized Difference in Difference (GDD) technique that identifies economic effects of hurricanes. Based on the Quarterly Census of Employment and Wages data, worker earnings in Florida counties hit by a hurricane increase up to 4 percent, whereas earnings in neighboring counties decrease. Over time, workers experience faster earnings and slower employment growth than workers in unaffected counties. Hurricanes have a greater impact in coastal and Panhandle counties, and powerful hurricanes have greater economic effects than weaker ones. Further, the GDD technique is applicable to analyze a wider range of exogenous shocks than hurricanes.