On Measuring Segregation in Samples With Small Units
指出标准隔离指数在小单位中会因随机分配产生偏差，并修改两个常用指数以衡量系统性的群体隔离，实证表明改进后的指数更准确。
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. We 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. We then modify two popular indexes so that they measure deviations from random allocation rather than deviations from evenness. An empirical example suggests that these modified indexes provide improved measures of the systematic component of group segregation.