The Marginal Effect of New Deal Relief Work on County-Level Unemployment Statistics
利用1937年和1940年人口普查数据，估计县级每多雇佣一名救济工作者对当地失业统计数字的影响，并讨论因经济条件难以控制带来的估计难题。
This article uses 1937 and 1940 Census data to estimate the effect that hiring an additional relief worker in a county had on unemployment statistics for that county. The fundamental estimation problem arises because one cannot easily control for economic conditions that influenced both the number of individuals holding relief jobs and the number counted as jobless.