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  • Svy brr

    I am running an irt gpcm using svy, and I get the following error message

    variable W_FSTUWT not found:


    Click image for larger version

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    Here is what I know:

    1. The variables W_FSTUWT W_FSTURWT1...W_FSTUWT W_FSTURWT80 are in the data file, as one can see from variable list on the right of the screen shot

    2. If I run other svy commands, immediately before or after, on the same dataset, something like the mean, svy seems to work very well:

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    3. If I run irt gpcm immediately before or after, on the same variables and same dataset, including the weights [pw=W_FSTUWT], the model is estimated:


    Click image for larger version

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    Any idea of what the problem is?

    ​​​​​​​Aldo Rustichini
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