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Volume 23 Number 2
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The Stata Journal
Volume 23 Number 2
: pp. 589-594
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Stata tip 152: if and if: When to use the if qualifier and when to use the if command
Nicholas J. Cox
Department of Geography
Durham University
Durham, U.K.
[email protected]
Clyde B. Schechter
Albert Einstein College of Medicine
Bronx, NY
[email protected]
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