INEQ: Stata module to calculate measures of inequality

Nicholas Cox

Statistical Software Components from Boston College Department of Economics

Abstract: ineq treats its input as an additive variable (that is, it is assumed that totals make sense and that no negative values are present in the data specified) and calculates three measures of inequality. Given n values of y, scale to proportions p = y / SUM y. Then Simpson's index is SUM p^2. Shannon entropy is -SUM p ln p = SUM p ln 1/p. The dissimilarity index is (1 / 2) SUM | p - 1 / n |. These measures are known under a variety of names, and a variety of related guises, in different fields.

Language: Stata
Requires: Stata version 5.0
Keywords: inequality; entropy; dissimilarity; diversity; segregation (search for similar items in EconPapers)
Date: 1999-01-08
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http://fmwww.bc.edu/repec/bocode/i/ineq.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/i/ineq.hlp help file (text/plain)

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