Software Projects

Amelia is named after this famous missing person
Amelia: A Program for Missing Data CRAN github vignette slides more info

(with James Honaker and Gary King)

Amelia is an R package for the multiple imputation of incomplete data. Multiple imputation is a method to overcome the computational problem of missing data while maintaining good statistical properties. Amelia uses a bootstrap-based algorithm that increases speed and robustness. In addition, Amelia includes a graphical user interface that requires no knowledge of R at all.

Are your results teetering?
causalsens: A Selection Bias Approach to Sensitivity Analysis for Causal Effects CRAN github vignette

causalsens is an R package to implement the selection bias approach to sensitivity analysis for causal effects as introduced in Blackwell (2014). This approach allows researchers to evaulate the effect of unmeasured confounders on their estimated effects varying both the strength and direction of the confounding.

The Columbus Egg
CEM: Coarsened Exact Matching more info

(with Stefano Iacus, Giuseppe Porro and Gary King)

CEM is a package for R, Stata, and SPSS that implements the method of coarsened exact matching. CEM improves causal inferences and reduces model dependence by making observations more comparable. I helped to write the Stata and SPSS packages.

Cousteau theme
Cousteau: A minimalist aquatically tinged beamer theme github

Cousteau is a minimalist Beamer theme with a light nautical touch. Cousteau assumes you are using XeTeX to typeset you slides and that the Fira Sans fonts (including Fira Mono) are installed on your system.

Direct effects
DirectEffects: Estimating controlled direct effects CRAN github vignette

(with Avi Acharya and Maya Sen)

DirectEffects is an R package to estimate controlled direct effects. As of now, the only model supported is sequential g-estimation, but we plan to expand to other models, including doubly robust estimators, in the future. For more information on how CDEs can be useful for applied research and a brief introduction to sequential g-estimation, see our 2016 APSR. Note that this package is still in alpha stages and is under rapid development.

factiv: Analyzing Factorial Experiments with Noncompliance github

(with Nicole Pashley)

factiv is an R package to analyze 2K factorial experiments with noncompliance. Currently, it implements the finite-population and superpopulation inference approaches described in Blackwell and Pashley (2020). Note that this package is still in early stages. Learn how to install it on the github page.

inters: Tools for estimating interactions github

(with Michael Olson)

inters is an R package with tools to estimate interactions. Currently, it implements the post-double-selection approach to estimating interactions described in this working paper by Matthew Blackwell and Michael Olson. Note that this package is still in alpha stages and is under rapid development. Learn how to install it on the github page.