The Importance of Cost of Living and Education in Estimates of the Conditional Wage Gap Between Black and White Women
研究发现，在控制生活成本和受教育年限后，黑人女性相对于白人女性的工资优势消失，说明此前观察到的工资溢价源于遗漏变量偏差。
While evidence about discrimination in U.S. labor markets typically implies preferential treatment for whites, recent studies document a substantial wage premium for black women (for example, Fryer 2011). Although differential selection of black and white women into the labor market has been a suggested explanation, we demonstrate that accounting for selection does not eliminate the estimated premium. We then incorporate two additional omitted variables recently documented in the literature: (1) local cost of living and (2) years of education attained, conditional on AFQT score. After controlling for these variables, we find no evidence of a wage premium for black women.