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Technical Report Panel Study of Income Dynamics Revised Longitudinal Weights 1993-2005 June, 2008 Elena Gouskova, Steven G. Heeringa, Katherine McGonagle, and Robert F. Schoeni Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor, MI 1. Introduction This document describes the construction of a revised set of 1993-2003 Core/Immigrant individual and family longitudinal sample weights for the Pan el Study of Income Dynamics (PSID). These weights are a revised versi on of the longitudinal weights currently included in the PSID data public use data sets for these years. The new approach described in this document was also used to construct the 2005 core/immigrant longitudinal weights. The principal difference between the old and new weights is found in the approach for assigning weights to “reappearers”, i.e., persons who return to the study after skipping one or more waves. PSID analysts who use the revised longitudinal weights for cross-sectional analysis of a single wave of data will find increased case counts of sample persons with positive weights. Researchers conducting l ongitudinal analyses such as studies of simple change over time, general linear mixed modeling (e.g. growth curves), latent variable modeling or event history analyses will also have increased case counts; however, they will need to pay special a ttention to the pattern of missing data over time since the revised weights assign non-zero values to a significant number o f cases with an incomplete data series for the period 1985-1993. Prior to 1993, the number of PSID sample persons who “reappeared” in the interviewed sample after one or more waves of nonresponse was very limited—typically around 100-150 per year. Individual weight values for these returning cases were set to 1

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