agg_ddd                 Aggregate Group-Time Average Treatment Effects
                        in Staggered Triple-Differences Designs.
ddd                     Doubly Robust DDD estimators for the group-time
                        average treatment effects.
gen_dgp_2periods        Function that generates panel data with single
                        treatment date assignment and two time periods.
gen_dgp_mult_periods    Generate panel data with staggered treatment
                        adoption (three periods)
