MENGER: Stata module to compute the Menger curvature

Ariel Linden ()
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Ariel Linden: Linden Consulting Group, LLC

Statistical Software Components from Boston College Department of Economics

Abstract: menger computes the Menger curvature, which is a concept from geometry that measures how "curved" a triplet of points is, based on the circle that passes through them (see the wikipedia entry for greater detail). menger iterates through each triplet of values in yvar and finds the curvature value. The maximum curvature point indicates where the curve becomes more "flat" -- generally referred to as the "elbow" or "knee". menger_estat computes the Menger curvature as a post-estimation command following factor and pca, as a means of finding an alternative number of factors (components) to that used in Stata’s official factor or "eye-balled" with screeplot.

Language: Stata
Requires: Stata version 11
Keywords: Menger curvature; inflection point; elbow; knee; screeplot; factor (search for similar items in EconPapers)
Date: 2025-10-09, Revised 2025-10-12
Note: This module should be installed from within Stata by typing "ssc install menger". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/m/menger.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/menger.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/m/menger_estat.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/menger_estat.sthlp help file (text/plain)

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