Basic Difference-in-Differences Method (DID) | Estimation Methods | Stata Tutorials Topic 42

Опубликовано: 27 Май 2026
на канале: Dr. Bob Wen (Stata, Economics, Econometrics)

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Stata Tutorials Topic 42: Basic Difference-in-Differences Method (DID) | Regression Analysis and Estimation Methods Using Stata

Hi, I am Bob. Today, we will discuss a popular identification strategy in evaluating policy effects. It is the difference-in-differences method. We use this technique to investigate whether a policy or a treatment has a significant causal effect on the outcome variable.

Please download the DID.dta dataset:
https://drive.google.com/file/d/1uKZF...

#Stata #DID #tutorial #DifferenceinDifferences #tabulate #regress #interactionterm #RegressionAnalysisandEstimationMethods #OLS #treatment #controlgroup #treatmentgroup #tutorial

The Stata commands in this video:
*DID using "tabulate"
tabulate treatment after, summarize(divorced) nofreq nost

display .16188525- .1064257
display .10526316- .06951027
display .05545955- .03575289

*DID using "regress"
regress divorced i.treatment##i.after

*DID with additional controls
regress divorced i.treatment##i.after fam_inc num_chi

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