Factor Proportions and Relative Wages: The Supply-Side Determinants of Wage Inequality
研究了供给侧因素对工资不平等的影响，包括女性劳动参与和移民对低技能男性工资的潜在影响，以及人力资本投资对高收入群体不平等增长的抑制作用。
Supply-side factors may contribute to rising wage inequality. First, certain changes in the supply of skills allegedly exacerbate wage inequality. Women's increased labor force participation and increased immigration are the leading candidates; both allegedly reduce the wages of less-skilled men. However, immigration's impact on wage inequality has been minor and the effects of women's participation is inconclusive. Second, in evaluating the likelihood that human capital investment will mitigate future inequality, evidence suggests that rising returns to education have increased the proportion of young people attending college, limiting the growth of inequality among high-wage workers.