did2s 0.6.0

• Added estimator argument to event_study and added vignette discussing the different estimators’ assumptions

did2s 0.5.0

• Made code more robust by improving sparse model matrix creation

• Rewrote covariance matrix creation to be faster and more robust

• Improved block bootstrapping code using boot::boot

• Fixed Sun and Abraham bug in event_study, h/t Frederik Noack

did2s 0.4.0

• Add event_study and plot_event_study functions

• Seperated did_imputation to new package didimputation

did2s 0.3.0

• Add did_imputation following Borusyak, Jaravel, and Spiess (2021)

• Speed up did2s

did2s 0.2.0

• Use sparse matrices to use much less memory

• Fix analytic standard errors when using weights

did2s 0.1.0

• Correct and robust standard errors