Ashraf, Javed - In: Eastern Economic Journal 17 (1991) 2, pp. 245-252
Cross-section and time-series data from the Panel Study of Income Dynamics from 1967 to 1981 are pooled generating a data set large enough to allow calculation of union-nonunion wage differentials for as many as 260 subgroups in the population. No previous study has examined as many groups. The...