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  • Pooling survey datasets

    Hello, everyone.

    I’m working with two waves/years’ worth of data from a nationally representative survey, and I need to combine the two samples to work with a larger sample in a cross-sectional analysis. Each database has a final weight variable plus 100 replicated weights - the method used to calculate standard errors is the delete-a-group jackknife. They do not provide variables such as PSU and strata due to confidentiality concerns.

    After using the `append` command to merge the datasets, I declared the dataset as a survey using this command (does this look correct?):
    svyset [pw = finalweight], vce(jackknife) jkrweight(finalweightrep1 - finalweightrep100) mse

    Seems ok to use the weight variables without adjustment to estimate proportions or use regression models?

    Also, I need to create variables in quintiles (I think it is not correct create quintiles variables before the append, isn't it?). In this case, should I weight this variable? The `xtile` option has three types of weighting—which one should I use, considering the weighting method used in this research?

    Thanks in advance!
    Last edited by Carol Gallo; 15 Jul 2026, 19:38.
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