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