DIDPLACEBO: Stata module for in-time, in-space and mixed placebo tests for estimating difference-in-differences (DID) models

Qiang Chen, Ji Qi () and Guanpeng Yan ()
Additional contact information
Qiang Chen: Shandong University
Ji Qi: Shandong University
Guanpeng Yan: Shandong University of Finance and Economics

Statistical Software Components from Boston College Department of Economics

Abstract: didplacebo implements placebo tests for estimating difference-in-differences (DID) models, where policy adoption may be synchronized or staggered. In particular, didplacebo performs in-time placebo tests using fake treatment times, in-space placebo tests using fake treatment units (randomly selected), and mixed placebo tests using both fake treatment units and times (both randomly selected). Moreover, didplacebo produces convenient graphs for visualization.

Language: Stata
Requires: Stata version 16
Keywords: difference in differences; DiD; placebo; graphics (search for similar items in EconPapers)
Date: 2023-07-27, Revised 2025-01-16
Note: This module should be installed from within Stata by typing "ssc install didplacebo". 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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http://fmwww.bc.edu/repec/bocode/d/didplacebo.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/d/didplacebo.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/t/tofirsttreat.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/t/tofirsttreat.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/x/xtrantreat.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/x/xtrantreat.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/x/xtshuffle.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/x/xtshuffle.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/b/bbb.dta supplementary data file (application/x-stata)
http://fmwww.bc.edu/repec/bocode/c/caoFile-URL:htt ... ec/bocode/_/chen.dta supplementary data file (application/x-stata)
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