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

## Documentation for package ‘did2s’ version 0.6.0

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

castle | Data from Cheng and Hoekstra (2013)
df_het | Simulated data with two treatment groups and heterogenous effects Generated using the following call: 'did2s::gen_data(panel = c(1990, 2020), g1 = 2000, g2 = 2010, g3 = 0, te1 = 2, te2 = 1, te3 = 0, te_m1 = 0.05, te_m2 = 0.15, te_m3 = 0)'
df_hom | Simulated data with two treatment groups and homogenous effects Generated using the following call: 'did2s::gen_data(panel = c(1990, 2020), g1 = 2000, g2 = 2010, g3 = 0, te1 = 2, te2 = 2, te3 = 0, te_m1 = 0, te_m2 = 0, te_m3 = 0)'
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
plot_event_study | Estimate event-study coefficients using TWFE and 5 proposed improvements.