[* EiR = Econometrics in Replications, a feature of TRN that highlights useful econometrics procedures for re-analysing existing research.] NOTE: All the data and code necessary to produce the results in the tables below are available at Harvard’s Dataverse: click here. Fixed effects estimators are often used when researchers are concerned about omitted variable bias due to unobserved, time-invariant variables.
[* EiR = Econometrics in Replications, a feature of TRN that highlights useful econometrics procedures for re-analysing existing research. The material for this blog is primarily drawn from the recent working paper “ Difference-in-differences with variation in treatment timing” by Andrew Goodman-Bacon, available from his webpage at Vanderbilt University. FIGURE 1 is modified from a lecture slide by Pamela Jakiela and Owen Ozier.