Speaking Stata: Compared with ...
Nicholas J. Cox
Department of Geography
Durham University
Durham, UK
[email protected]
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Abstract. Many problems in data management center on relating values to values
in other observations, either within a dataset as a whole or within groups such as
panels. This column reviews some basic Stata techniques helpful for such tasks,
including the use of subscripts, summarize, by:, sum(), cond(),
and egen. Several
techniques exploit the fact that logical expressions yield 1 when true and 0 when
false. Dividing by zero to yield missings is revealed as a surprisingly valuable
device.
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Nicholas J. Cox
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data management, panels, subscripting, summarize, by, sum(), cond(), egen, logical expressions
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