Thanks to Michael Blasnik and Richard Williams for their comments. I
rewrote my do-files so that normalized weights are calculated for
each -tabstat- command.
The Stata User's Guide states in section 14.1.6: "For most Stata
commands, the recorded scale of aweights is irrelevant; Stata
internally rescales them to sum to N, the number of observations in
your data, when it uses them." It would be useful if the Stata
documentation could make clear which commands don't use aweights in
this manner.
Friedrich Huebler
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