for median weekly earnings growth into the part associated with the wage growth ofpersons employed at the beginning and … end of the period (the wage growth effect) and the part associated withchanges in the composition of earners (the … tight job switchers get high wage increases,making them account for half of the variation in median weekly earnings growth …

spells in entrepreneurship versus wage employment, thereby accounting for selectivity into entrepreneurial positions based on … control over the profitable employment of their human capital than wage employees. …