This is essentially the same thing as what we did for precinct-level electoral data data in the census county code step above. Based on the information returned by plvdkey.exe in the file xx.mg, we assign MCD-group codes to the MCD-level observations in our working version of the STF3a dataset.
The SAS code file to perform this step is called matstfxx.sas. It will modify the STF3a file stfMCDxx.sd2 by adding to it a column for MCD-group.
What should be left over:
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