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"No observations" is here non-Stata language
for "all missing", meaning all empty strings.
String missings sort to the beginning.
Thus all values of a string variable in a group of
observations are missing if and only if the
last such value is missing after a -sort-
on that variable.
Thus
bysort location (var1) : gen byte allmiss = _n == _N & mi(var1)
l location if allmiss
Nick
[email protected]
*
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