Thus, one can reduce redundant computation using the clear option in the first specification and the nobuild option in subsequent specifications. Examples Generically, adapting specifications to ...

The dd package provides two effective helper functions to estimate and visualize a difference-in-differences model (DD) with leads and lags. Studies using such specifications are often referred to as ...

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, ...