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fixed effect counterfactual estimators
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Will the result still be valid if some units are untreated, treated, and then untreated again? #2

Closed jluo41 closed 4 years ago

jluo41 commented 4 years ago

The ordinary policy pattern is being untreated, and then treated (that is D = [0,0,0, ..., 1,1,1...].

What if the policy pattern is being untreated, treated, and then untreated? That is the D = [0,0,0,0, ..., 1,1,1, ..., 0,0,0 ...]. Will the result still be valid? Can the result still be interpreted in the previous way?

Thanks,

Junjie

xuyiqing commented 4 years ago

Yes, it will be valid, as long as you are willing to accept the assumption that the treatment only has contemporaneous effects (as in two-way fixed effects).

On Fri, Jun 12, 2020 at 2:23 AM floydluo notifications@github.com wrote:

The ordinary policy pattern is being untreated, and then treated (that is D = [0,0,0, ..., 1,1,1...].

What if the policy pattern is being untreated, treated, and then untreated? That is the D = [0,0,0,0, ..., 1,1,1, ..., 0,0,0 ...]. Will the result still be valid? Can the result still be interpreted in the previous way?

Thanks,

Junjie

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-- Yiqing Xu

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jluo41 commented 4 years ago

Great! Thanks for your reply.