Wage decompositions with selectivity-corrected wage equations: A methodological note

被引：2

作者：

Neuman S. ^{[1
]}

Oaxaca R.L. ^{[2
]}

机构：

[1] CEPR London, Department of Economics, Bar-Ilan University

[2] IZA Bonn, Department of Economics, University of Arizona, Tucson, AZ 85721-0108

来源：

The Journal of Economic Inequality | 2004年 / 2卷 / 1期

关键词：

Identification; Selectivity bias; Wage decompositions;

D O I：

10.1023/B:JOEI.0000028395.38694.4b

中图分类号：

学科分类号：

摘要：

This paper examines the implications of the standard Heckman (Heckit) correction for selectivity bias in wage and earnings functions that are subsequently used in wage decompositions. Even when justified, Heckit selectivity correction introduces some fundamental ambiguities in the context of wage decompositions. The ambiguities arise from group differences in the selection term which consists of a parameter multiplied by the Inverse Mills Ratio (IMR). The parameter is identified as the product of the standard deviation of the errors in the wage equation and the correlation between the wage equation error and the selection equation error. How should group differences in these parameters be interpreted in terms of structural differences and endowment effects? The same issue arises with respect to group differences in the IMR which reflect nonlinear group differences in the determinants of selection and in the probit coefficients. © Kluwer Academic Publishers 2004.

引用

页码：3 / 10

页数：7

共 19 条

[1]

Blau F.D., Kahn L.M., Swimming upstream: Trends in the gender wage differential in the 1980's, J. Labor Economics, 15, pp. 1-42, (1997)

[2]

Blinder A.S., Wage discrimination: Reduced form and structural estimates, J. Human Resources, 8, pp. 436-455, (1973)

[3]

Boymond M., Fluckiger Y., Silber J., Wage discrimination and occupational segregation by gender: Some evidence from Swiss data, (1994)

[4]

Cragg J., Some statistical models for limited dependent variables with applications to the demand for durable goods, Econometrica, 39, pp. 829-844, (1971)

[5]

Datta Gupta N., Oaxaca R.L., Smith N., The Danish gender wage gap and wage determination in the private and public sectors, Gender and the Labour Market: Econometric Evidence on Obstacles in Achieving Gender Equality, (2000)

[6]

Duncan G.M., Leigh D.E., Wage determination in the union and nonunion sectors: A sample selectivity approach, Industrial and Labor Relations Review, 34, pp. 24-34, (1980)

[7]

Gronau R., Wage comparisons: A selectivity bias, J. Political Economy, 82, pp. 1119-1143, (1974)

[8]

Heckman J., The common structure of statistical models of truncation, sample selection and limited dependent variables and a simple estimator for such models, Annals of Economic and Social Measurement, 5, pp. 475-492, (1976)

[9]

Heckman J., Sample selection bias as a specification error, Econometrica, 47, pp. 153-163, (1979)

[10]

Juhn C., Murphy K.M., Pierce B., Accounting for the slowdown in black-white wage convergence, Workers and Their Wages: Changing Patterns in the United States, (1991)

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