Before revision:  Finally, we estimate the weights in two applications and find that in both cases, around half of the average treatment effects receive a negativeweight .
After revision:  Finally, we estimate the weights in two applications and find that in both cases, around half of the weights attached to those regressions are negative. In one application, our new estimator is of a different sign than the first two-way fixed effects estimator we study, and significantly different from the second one .