Pooling Annual Files. Starting in panel 9, values for DUPERSID from previous panels will occasionally be re- used. Therefore, it is necessary to use the panel variable (PANEL) in combination with DUPERSID to ensure unique person-level identifiers across panels. Creating unique records in this manner is advised when pooling MEPS data across multiple annual files that have one or more identical values for DUPERSID.
Pooling Annual Files. To facilitate analysis of subpopulations and/or low prevalence events, it may be desirable to pool together more than one year of data to yield sample sizes large enough to generate reliable estimates. For more details on pooling MEPS data files see xxx.xxxx.xxxx.xxx/xxxx_xxxxx/xxxxxxxx_xxxx_xxxxx_xxxxxx.xxx?xxxXxxXxxxxx=XX-000. Starting in Panel 9, values for DUPERSID from previous panels will occasionally be re- used. Therefore, it is necessary to use the panel variable (PANEL) in combination with DUPERSID to ensure unique person-level identifiers across panels. Creating unique records in this manner is advised when pooling MEPS data across multiple annual files that have one or more identical values for DUPERSID.
