DRDID 1.0.3 Unreleased

  • Add new flags for non-unique unit identifier

  • Better handle of factor variables as covariates

DRDID 1.0.2 Unreleased

  • Fix issue with NA in covariates

DRDID 1.0.1 2021-01-07

  • Allows for treating covariates as factor and alike when computing DiD

  • Improve error and warning handling due to collinearity and convergence issues.

DRDID 1.0.0 2020-05-18

  • 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).