Homemakers' Imputed Wages: Results of the Heckman Technique Compared with Women's Own Estimates
基于两个数据集，用三种方法估算非劳动力女性的潜在收入：回归法、赫克曼选择偏差调整法、以及女性自评法。发现自评法结果远高于调整法，说明简单调整选择偏差对家务劳动的机会成本评估可能无效。
Three estimates of potential earnings of women not in the labor force, based on two data sets, were obtained (1) by using the coefficients from the regression of employed women with characteristics of the homemaker, (2) by using Heckman's adjustment for selection bias, and (3) by using the women's own views of potential earnings. The second approach yielded lower estimates than the first, as expected. The third estimate was found to be considerably higher than the second, suggesting that simple adjustment for selection bias may not be useful for the opportunity cost approach to valuation of housework.