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利用州行政数据衡量项目绩效AI 解读

We use administrative data from Missouri to examine the sensitivity of earnings impact estimates for a job training program based on alternative nonexperimental methods. We consider regression adjustment, Mahalanobis distance matching, and various methods using propensity-score matching, examining both cross-sectional estimates and difference-in-difference estimates. Specification tests suggest that the difference-in-difference estimator may provide a better measure of…

小规模单位样本中的群体隔离测度AI 解读

Standard indexes of segregation measure a sample's distance from evenness, which occurs when each sample unit ( e.g., an occupation) has the population share of both the minority and majority groups. The authors show that random allocation of individuals to units generates substantial unevenness among small units and, hence, that standard segregation indexes reflect random allocation as well as systematic group segregation. They then modify two popular indexes so that they…