Labor Supply of Husbands and Wives: A Simultaneous Equations Approach
用面板数据建立动态联立方程组，估计已婚男女的劳动供给函数。结果发现，有学龄前儿童的家庭中夫妻工作时间存在强交互作用，而短期看无幼儿家庭的劳动供给并非联合决定。
Labor supply functions for married men and women are formulated as a dynamic simultaneous equations system which is estimated using panel data. Controlling for fixed individual effects allows marginal labor supply responses to be disentangled from permanent patterns in hours worked due to assortative mating. The results suggest that the labor supply of husbands and wives without pre-school children is not jointly determined in the short run while families with young children exhibit strong interactions in work hours and negative cross-earnings effects. Neither the joint utility model of family labor supply nor an ad hoc traditional family model is supported by these results. The data are for the United States and concern 381 couples from the Denver Income Maintenance Experiment. (EXCERPT)