shapleydecomp: Shapley Value Decomposition for Discrete-Time Simulation Models

Attributes changes in the outcomes of a discrete-time simulation model to its input factors using Shapley values (Shapley 1953) <doi:10.1515/9781400881970-018>, which for binary factors coincide with the symmetric standardization of Das Gupta (1993) <https://www2.census.gov/library/publications/1993/demographics/p23-186.pdf>. Any calibrated model can be decomposed by implementing four S3 methods that run the model, summarize its output, and construct counterfactual inputs. Counterfactuals either remove a factor entirely or hold it at its value in a baseline year, and a sequential decomposition attributes each year's policy conditional on the past.

Version:	1.0.0
Depends:	R (≥ 4.0.0)
Imports:	data.table, parallel, utils
Suggests:	knitr, rmarkdown, testthat (≥ 3.0.0)
Published:	2026-11-03
DOI:	10.32614/CRAN.package.shapleydecomp (may not be active yet)
Author:	Austin Carter [aut, cre]
Maintainer:	Austin Carter <aucarter at uw.edu>
BugReports:	https://github.com/aucarter/shapleydecomp/issues
License:	MIT + file LICENSE
URL:	https://github.com/aucarter/shapleydecomp, https://aucarter.github.io/shapleydecomp/
NeedsCompilation:	no
Materials:	README, NEWS
CRAN checks:	shapleydecomp results

Documentation:

Reference manual:	shapleydecomp.html , shapleydecomp.pdf
Vignettes:	Methods (source, R code) Get started (source, R code)

Downloads:

Package source:	shapleydecomp_1.0.0.tar.gz
Windows binaries:	r-devel: not available, r-release: shapleydecomp_1.0.0.zip, r-oldrel: shapleydecomp_1.0.0.zip
macOS binaries:	r-release (arm64): shapleydecomp_1.0.0.tgz, r-oldrel (arm64): shapleydecomp_1.0.0.tgz, r-release (x86_64): shapleydecomp_1.0.0.tgz, r-oldrel (x86_64): shapleydecomp_1.0.0.tgz

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