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Abstract

This article proposes a method for analyzing data from panels and pooled cross-sections that can separate the effects of exogenous variables on the endogenous variable into cross-unit and longitudinal components. Monte Carlo results suggest that estimation using estimated generalized least squares is close to theoretical expectations for unbiasedness and reasonably reproduces the expected distribution of confidence intervals for a variety of combinations of number of units and time points. To illustrate the substantive utility of the decomposition, an analysis is presented of the effects of unionization and economic conditions on race-gender group industrial earnings inequality that yields dramatically different longitudinal and cross-unit effects.

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References

Beck, E. M. 1980. “Labor Unionism and Racial Income Inequality: A Time Series Analysis of the Post-World War II Period.” American Journal of Sociology 85:791-814.

Hannan, Michael T. and Alice A. Young . 1977. “Estimation in Panel Models: Results on Pooling Cross-Sections and Time-Series.” Pp. 52-83 in Sociological Methodology 1977, edited by David R. Heise . San Francisco: Jossey-Bass.

Judge, George G. , W. E. Griffiths , R. Carter Hill , Helmut Lütkepohl , and Tsoung-Chao Lee . 1985. The Theory and Practice of Econometrics. 2nd Ed. New York: Wiley.

Kaufman, Robert L. 1990. “The Relationship Between Unionization and Racial-Gender Group Inequality.” Paper presented at the 1990 annual meetings of the American Sociological Association, Washington, DC.

Kmenta, Jan . 1986. Elements of Econometrics. 2nd Ed. New York: Macmillan.

Maddala, G. S. 1971. “The Use of Variance Components in Pooling Cross Section and Time Series Data.” Econometrica 39:341-358.

Sayrs, Lois W. 1989. Pooled Time Series Analysis. Newbury Park, CA: Sage.

Tuma, Nancy Brandon and Michael T. Hannan . 1984. Social Dynamics: Models and Methods. New York: Academic Press.

U.S. Bureau of the Census . 1981. Current Population Reports, Series P-60, No. 127, Money Income and Poverty Status of Families and Persons in the U.S.: 1980. Washington, DC: U.S. Government Printing Office.

10.

White, Kenneth J. 1987. “SHAZAM: A General Computer Program for Econometric Methods (Version 5).” American Statistican 41(1):80.

Decomposing Longitudinal from Cross-Unit Effects in Panel and Pooled Cross-Sectional Designs

Abstract

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