MRTAnalysis: Assessing Proximal, Distal, and Mediated Causal Excursion Effects for Micro-Randomized Trials

Provides methods to analyze micro-randomized trials (MRTs) with binary treatment options. Supports four types of analyses: (1) proximal causal excursion effects, including weighted and centered least squares (WCLS) for continuous proximal outcomes by Boruvka et al. (2018) <doi:10.1080/01621459.2017.1305274> and the estimator for marginal excursion effect (EMEE) for binary proximal outcomes by Qian et al. (2021) <doi:10.1093/biomet/asaa070>; (2) distal causal excursion effects (DCEE) for continuous distal outcomes using a two-stage estimator by Qian (2025) <doi:10.1093/biomtc/ujaf134>; (3) mediated causal excursion effects (MCEE) for continuous distal outcomes, estimating natural direct and indirect excursion effects in the presence of time-varying mediators by Qian (2025) <doi:10.48550/arXiv.2506.20027>; and (4) standardized proximal effect size estimation for continuous proximal outcomes, generalizing the approach in Luers et al. (2019) <doi:10.1007/s11121-017-0862-5> to allow adjustment for baseline and time-varying covariates for improved efficiency.

Version:	0.4.1
Depends:	R (≥ 4.2)
Imports:	rootSolve, stats, geepack, sandwich, mgcv, randomForest, ranger, boot
Suggests:	knitr, rmarkdown, testthat (≥ 3.0.0), SuperLearner, earth, dplyr
Published:	2026-01-24
DOI:	10.32614/CRAN.package.MRTAnalysis
Author:	Tianchen Qian [aut, cre], Shaolin Xiang [aut], Zhaoxi Cheng [aut], Xinyi Song [aut], John Dziak [aut], Audrey Boruvka [ctb]
Maintainer:	Tianchen Qian <t.qian at uci.edu>
License:	GPL-3
NeedsCompilation:	no
Materials:	README, NEWS
CRAN checks:	MRTAnalysis results

Documentation:

Reference manual:	MRTAnalysis.html , MRTAnalysis.pdf
Vignettes:	Exploratory Analysis for Micro-Randomized Trial (MRT): Continuous Distal Outcomes (source, R code) Time-Varying Causal Excursion Effect Mediation in MRT: Continuous Distal Outcomes (source, R code) Primary and Secondary Analysis for Micro-Randomized Trial (MRT): Proximal Outcomes (source, R code) Standardized Proximal Effect Size in MRTAnalysis (source, R code)

Downloads:

Package source:	MRTAnalysis_0.4.1.tar.gz
Windows binaries:	r-devel: MRTAnalysis_0.4.1.zip, r-release: MRTAnalysis_0.4.1.zip, r-oldrel: MRTAnalysis_0.4.1.zip
macOS binaries:	r-release (arm64): MRTAnalysis_0.4.1.tgz, r-oldrel (arm64): MRTAnalysis_0.4.1.tgz, r-release (x86_64): MRTAnalysis_0.4.1.tgz, r-oldrel (x86_64): MRTAnalysis_0.4.1.tgz
Old sources:	MRTAnalysis archive

Linking:

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