Content deleted Content added
Thenightaway (talk | contribs) |
m Open access bot: url-access=subscription updated in citation with #oabot. |
||
Line 110:
But this is the expression for the treatment effect that was given in the [[#Formal Definition|formal definition]] and in the above table.
Variants of difference-in-difference frameworks include ones for staggered implementation of treatment as well as an estimator introduced for multiple time periods and other variations by Brantly Callaway and [[Pedro H.C. Sant'Anna]].<ref>{{Cite journal |last=Callaway |first=Brantly |last2=Sant’Anna |first2=Pedro H. C. |date=2021-12-01 |title=Difference-in-Differences with multiple time periods |url=https://www.sciencedirect.com/science/article/abs/pii/S0304407620303948 |journal=Journal of Econometrics |series=Themed Issue: Treatment Effect 1 |volume=225 |issue=2 |pages=200–230 |doi=10.1016/j.jeconom.2020.12.001 |issn=0304-4076|url-access=subscription }}</ref>
==Example==
| |||