Allows for treating covariates as factor and alike when computing DiD
Improve error and warning handling due to collinearity and convergence issues.
First official version of package, functions for computing a variety of difference-in-differences (DiD) estimators for the ATT.
Documentation is improved compared to the devel version, including examples for every function now.
Created wrapper function drdid, ordid and ipwdid to implement doubly-robust, outcome regression and inverse probability weighted DID estimators.
Add dataset used in the empirical application of Sant’Anna and Zhao (2020).