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  • Placebo test for DID analysis

    Hello!
    I'm conducting a project utilizing a Difference-in-Differences (DiD) framework to investigate the effects of a policy implemented in a staggered manner across various states and years.
    Below is my regression model and the associated code. Now I want to perform a placebo test grounded on this baseline regression, but I don't know how to do that in Stata. Thanks!

    y=a1*treat*post+controls+FE
    code: reghdfey treat*post $controls, absorb($fixed_effects) vce(cluster fips)
Working...
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