stackdid: Stacked Difference-in-Differences Regression A Stata command that performs stacked difference-in-differences regression for staggered treatment settings, as described in Gormley and Matsa ...

dd - Tools to estimate difference-in-differences models with leads and lags in R The dd package provides two effective helper functions to estimate and visualize a difference-in-differences model (DD) ...

This paper proposes a method to estimate treatment effects in difference-in-differences designs in which the treatment start is staggered over time and treatment effects are heterogeneous by group, ...

This paper used the difference-in-differences model to explore the impact of urban and rural medical insurance integration policy on children's health and the moderating effect model to analyze the ...

A number of people commented on what appears to be a comical difference in the new MacBook Air specs, between the $999 base model and the $1249 version.