Toolkit for Weighting and Analysis of Nonequivalent Groups
A Tutorial for the R TWANG Package
ToolPublished Jul 7, 2022
This tutorial describes the use of the TWANG package in R to estimate propensity score weights when there are two treatment groups, and how to use TWANG to estimate nonresponse weights. Specifically, it describes the "ps" function (which stands for Propensity Scores), the proper syntax for using the function, and the features the function contains. An updated version of the TWANG R package with efficiency and performance improvements was released in January 2022.
Topics
Document Details
- Copyright: RAND Corporation
- Availability: Web-Only
- Year: 2022
- DOI: https://doi.org/10.7249/TL-A570-5
- Document Number: TL-A570-5
Citation
RAND Style Manual
Ridgeway, Greg, Daniel F. McCaffrey, Andrew R. Morral, Matthew Cefalu, Lane F. Burgette, Joseph D. Pane, and Beth Ann Griffin, Toolkit for Weighting and Analysis of Nonequivalent Groups: A Tutorial for the R TWANG Package, RAND Corporation, TL-A570-5, 2022. As of October 9, 2026: https://www.rand.org/pubs/tools/TLA570-5.html
Chicago Manual of Style
Ridgeway, Greg, Daniel F. McCaffrey, Andrew R. Morral, Matthew Cefalu, Lane F. Burgette, Joseph D. Pane, and Beth Ann Griffin, Toolkit for Weighting and Analysis of Nonequivalent Groups: A Tutorial for the R TWANG Package. Santa Monica, CA: RAND Corporation, 2022. https://www.rand.org/pubs/tools/TLA570-5.html.
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Version Note
This publication supersedes previous versions published in 2013 (EP-50211) and 2014 (TL-136/1-NIDA).