The Definition of Part-Time Employment: A Switching Regression Model with Unknown Sample Selection
拒绝每周少于35小时的兼职标准定义，基于雇主对高工时（全职）和低工时（兼职）工人的工资支付差异，通过估计具有未知样本选择的转换回归模型，提出一个经验上合理的兼职定义，并计算和分解工资差异。
Rejecting the standard less-than-thirty-five-hours-per-week categorization of part-time workers, this paper offers an empirically-justified definition of the part-time employed. The definition is based on the distinction through wage payments that employers make between a high-hours (full-time) and a low-hours (part-time) group of workers. A switching regression model of wage equations with deterministic, but unknown, sample selection is estimated resulting in a significant split between high-hours and low-hours workers that is higher than the standard definition. Wage differentials are calculated and decomposed, and estimates from the structural choice model are presented. Copyright 1991 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.