Package: HOIF
Type: Package
Title: Higher-Order Influence Function Estimators for the Average
        Treatment Effect
Version: 0.2.0
Authors@R: c(person("Xingyu", "Chen",
                  email = "xingyuchen0714@sjtu.edu.cn",
                  role = c("aut", "cre")),
          person("Lin", "Liu",
           email = "linliu@sjtu.edu.cn",
           role = "aut"))
Description: Implements Higher-Order Influence Function (HOIF)
        estimators of the Average Treatment Effect (ATE), following
        Robins et al. (2008) <doi:10.1214/193940307000000527>, Liu et
        al. (2017) <doi:10.48550/arXiv.1705.07577> and Liu and Li
        (2023) <doi:10.48550/arXiv.2302.08097>. Estimators of any order
        are supported, with optional covariate basis transformations
        (B-splines, Fourier) and optional K-fold sample splitting
        (cross-fitting) for improved finite-sample performance. The
        core higher-order U-statistics are computed exactly via the
        'ustats' package, an R interface to the 'Python' package
        'u-stats'; the underlying algorithm and its computational
        complexity are analyzed in Chen, Zhang and Liu (2025)
        <doi:10.48550/arXiv.2508.12627>. A pure R implementation (up to
        order 6) is also provided as a fallback that does not require
        'Python'.
License: MIT + file LICENSE
Encoding: UTF-8
Depends: R (>= 4.0.0)
Imports: splines, corpcor, SMUT, ustats (>= 0.1.5)
Suggests: MASS, testthat (>= 3.0.0), reticulate, knitr, rmarkdown
URL: https://cxy0714.github.io/HOIF/, https://github.com/cxy0714/HOIF
BugReports: https://github.com/cxy0714/HOIF/issues
SystemRequirements: For the default Python backend: Python (>= 3.11)
        with the 'u-stats', 'numpy' and 'torch' packages (provisioned
        automatically on first use via 'reticulate', or via
        ustats::setup_ustats()). Not needed when pure_R_code = TRUE.
Config/testthat/edition: 3
RoxygenNote: 7.3.3
VignetteBuilder: knitr
Language: en-US
NeedsCompilation: no
Packaged: 2026-06-24 13:22:05 UTC; root
Author: Xingyu Chen [aut, cre], Lin Liu [aut]
Maintainer: Xingyu Chen <xingyuchen0714@sjtu.edu.cn>
Config/pak/sysreqs: python3
Repository: https://cran.r-universe.dev
Date/Publication: 2026-06-24 08:40:10 UTC
RemoteUrl: https://github.com/cran/HOIF
RemoteRef: HEAD
RemoteSha: c28d25f48384cf893a0653da1cca0bd86fb67eb3