LONGCH: Stata module to identify how many records satisfy a condition

Tony Brady ()
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Tony Brady: Royal Postgraduate Medical School

Statistical Software Components from Boston College Department of Economics

Abstract: The command longch is used with data in which there are several records per subject. The variable idname identifies the subjects, and the string in c() contains a logical condition. The program reports the number of subjects for which some records satisfy the condition; the number for which no records satisfy the condition; and the number of subjects for which every record satisfies the condition. In addition the logical variables _some, _none and _every which flag the records are created. This is useful for dropping all records belonging to subjects of a particular type, eg those with no records satisfying the condition.

Language: Stata
Date: 1998-09-04

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http://fmwww.bc.edu/repec/bocode/l/longch.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/l/longch.hlp help file (text/plain)

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