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ipw  

Estimate Inverse Probability Weights
View on CRAN: Click here


Download and install ipw package within the R console
Install from CRAN:
install.packages("ipw")

Install from Github:
library("remotes")
install_github("cran/ipw")

Install by package version:
library("remotes")
install_version("ipw", "1.2.2")



Attach the package and use:
library("ipw")
Maintained by
Willem M. van der Wal
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2010-02-04
Latest Update: 2025-07-28
Description:
Functions to estimate the probability to receive the observed treatment, based on individual characteristics. The inverse of these probabilities can be used as weights when estimating causal effects from observational data via marginal structural models. Both point treatment situations and longitudinal studies can be analysed. The same functions can be used to correct for informative censoring.
How to cite:
Willem M. van der Wal (2010). ipw: Estimate Inverse Probability Weights. R package version 1.2.2, https://cran.r-project.org/web/packages/ipw. Accessed 26 Aug. 2026.
Previous versions and publish date:
(2026-07-09 07:50), 1.0-1 (2010-02-08 11:18), 1.0-2 (2010-02-14 15:44), 1.0-3 (2010-03-05 08:33), 1.0-4 (2010-03-08 16:39), 1.0-5 (2010-03-25 15:32), 1.0-6 (2010-08-20 22:29), 1.0-7 (2010-09-09 14:08), 1.0-8 (2010-09-30 20:58), 1.0-9 (2011-04-04 09:38), 1.0-10 (2011-09-11 17:54), 1.0-11 (2015-08-18 16:58), 1.0 (2010-02-04 20:40), 1.2.1.1 (2025-07-28 06:57), 1.2.1 (2023-12-11 09:22), 1.2.2 (2025-12-08 14:30), 1.2 (2023-01-07 02:10)
Other packages that cited ipw R package
View ipw citation profile
Other R packages that ipw depends, imports, suggests or enhances
Complete documentation for ipw
Functions, R codes and Examples using the ipw R package
Some associated functions: basdat . haartdat . healthdat . ipwplot . ipwpoint . ipwtm . timedat . tstartfun . 
Some associated R codes: ipwplot.R . ipwpoint.R . ipwtm.R . tstartfun.R .  Full ipw package functions and examples
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