immigrants are affected by expanding self-employment opportunities. Using a difference-in-differences and regression …

match schools that experienced shootings with observationally similar control schools in other districts. We use difference-in-differences …

match schools that experienced shootings with observationally similar control schools in other districts. We use difference-in-differences …

function (SBM-DDF) to measure industrial green innovation efficiency. Then we use a difference in differences (DID) model to …

-specific pension reform for women using two complementary empirical approaches - a Regression Discontinuity Design and a Difference-in-Differences …