Two-Stage Difference-in-Differences Following Gardner (2021)


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Documentation for package ‘did2s’ version 1.2.0

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castle Data from Cheng and Hoekstra (2013)
df_het Simulated data with two treatment groups and heterogenous effects
df_hom Simulated data with two treatment groups and homogenous effects
did2s Calculate two-stage difference-in-differences following Gardner (2021)
event_study Estimate event-study coefficients using TWFE and 5 proposed improvements.
gen_data Generate TWFE data
get_honestdid_obj_did2s get_honestdid_obj_did2s
honest_did_did2s honest_did_did2s
plot_event_study Estimate event-study coefficients using TWFE and 5 proposed improvements.
robust_solve_XtX Robust solve for X'X beta = X'Y using QR decomposition