Resources

R Packages

I am the co-creator of two packages for DiD methods, with others in development. See each package's README for instructions.

GMM Estimation of Treatment Effects Under Staggered Adoption

Companion to Estimating Treatment Effects under Staggered Timing and Non-Spherical Errors (with Rishabh Bijani).

install.packages("staggeredGMM")

View on CRAN Reference manual

Partial Homogeneity in Staggered Difference-in-Differences

Companion to A Bayesian Approach to Partial Homogeneity in Staggered Difference-in-Difference (with Rohan Wagle).

install.packages("phdid")

View on CRAN Reference manual

An Introduction to Instrumental Variables Using Simulations by Aratrika Patnaik and Isha BK (2026) A tutorial for readers new to econometrics that uses simulated data to show why OLS is biased and how IV corrects it.