This file is a two-year longitudinal file derived from the respondents to the MEPS Panel 9 sample. The persons on this data set represent those who were in the MEPS population (civilian noninstitutionalized) for all or part of the 2004-2005 period. The file contains a longitudinal weight variable (LONGWT), all variables from the 2004 and 2005 consolidated full-year files (HC-089 and HC-097, respectively), and the strata and PSU values from the full year consolidated files and the pooled variance data file (HC-036). The weight variable (LONGWT), when applied to the persons who participated in both 2004 and 2005, will enable the user to make national estimates of person-level changes in selected variables (e.g., health insurance, health status, utilization and expenditures). In addition, LONGWT can be used to develop cross-sectional type estimates for the two-year period and for each year individually based on only the Panel 9 sample. Update notes
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