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I'm a Senior Data Analyst at Columbia University. I'm mainly interested in causal inference and statistical computing in R and Julia.

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Nicholas Williams's Projects

adjrct icon adjrct

Doubly-Robust and Efficient Estimators for Survival and Ordinal Outcomes in RCTs Without Proportional Hazards or Odds Assumptions :pill:

broom icon broom

Convert statistical analysis objects from R into tidy format

cabinets icon cabinets

:package: for custom file structure templates accessible in R sessions outside the ones they were created in.

catfun icon catfun

R package for categorical data analysis aimed at new R users.

climblogs icon climblogs

Companion R :package: to the ClimbOn shiny :iphone: app

climbon icon climbon

Shiny :iphone: app for collecting gym climbing data

covid-rct-covar icon covid-rct-covar

Simulation study evaluating what variables should be included as covariates in analyses for COVID-19 RCTs

cv icon cv

CV in latex adapted from Dr. Geoff Boeing.

d3-book icon d3-book

Code examples for “Interactive Data Visualization for the Web”

dcme icon dcme

Mediation Effects with 2 Instrumental Variables

doesnpmatter icon doesnpmatter

Simulations for "Does Nonparametric Matter?" paper. :computer:

engineering-pad icon engineering-pad

An RStudio theme in honor of my favorite engineering pad :trollface:

formatix icon formatix

An R general computing toolbox :package:

hdmediation icon hdmediation

Efficient, doubly-robust--and possibly transported--estimation of interventional (in)direct effects with high-dimensional mediators and mediator-outcome confounders.

lcm icon lcm

Efficient and flexible causal mediation with longitudinal mediators, treatments, and confounders

lcmmtp icon lcmmtp

Longitudinal Mediation with Modified Treatment Policies

lmtp icon lmtp

:package: Non-parametric Causal Effects Based on Modified Treatment Policies :crystal_ball:

lmtp-simulations icon lmtp-simulations

Code used for the simulation study in the paper "Non-parametric casual effects based on longitudinal modified treatment policies."

marijuana-diff-in-diff icon marijuana-diff-in-diff

Shiny app for conducting a differences-in-differences analysis for substance use in states with recreational marijuana laws compared to aggregated substance use in the U.S.

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