WHICHDIDSHOULDIUSE: Stata module to classify a panel's difference-in-differences design

Alberto Trelles (), Clement de Chaisemartin () and Anzony Quispe ()
Additional contact information
Alberto Trelles: Sciences Po
Clement de Chaisemartin: Sciences Po
Anzony Quispe: Brown University

Statistical Software Components from Boston College Department of Economics

Abstract: whichdidshouldiuse reads a panel and classifies its difference-in-differences design as CLA, SAD, HAD, SFSD or OTHER, names a suitable estimator, and points you at the relevant chapter of Clement de Chaisemartin and Xavier D'Haultfoeuille's difference-in-differences textbook. It classifies; it does not estimate. There are no fixed effects, weights or standard-error options, because nothing is being fitted.

Language: Stata
Requires: Stata version 16 and distinct, did_had, gtools from SSC (q.v.)
Keywords: panel data; DiD; TWFE (search for similar items in EconPapers)
Date: 2026-10-24
Note: This module should be installed from within Stata by typing "ssc install whichdidshouldiuse". The module is made available under terms of the MIT license (https://opensource.org/licenses/MIT).
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Citations:

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/w/whichdidshouldiuse.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/w/whichdidshouldiuse.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/g/gentzkowetal_didtextbook.dta
http://fmwww.bc.edu/repec/bocode/m/moser_voena_didtextbook.dta
http://fmwww.bc.edu/repec/bocode/p/pierce_schott_didtextbook.dta
http://fmwww.bc.edu/repec/bocode/w/wolfers2006_didtextbook.dta

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