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

Robert L. Kaufman
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Robert L. Kaufman: Ohio State University

Sociological Methods & Research, 1993, vol. 21, issue 4, 482-504

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.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:sae:somere:v:21:y:1993:i:4:p:482-504

DOI: 10.1177/0049124193021004004

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