{ "_id": "6a3bdabe5cdecea1d68388ad", "Package": "HOIF", "Type": "Package", "Title": "Higher-Order Influence Function Estimators for the Average\nTreatment Effect", "Version": "0.2.0", "Authors@R": "c(person(\"Xingyu\", \"Chen\",\nemail = \"xingyuchen0714@sjtu.edu.cn\",\nrole = c(\"aut\", \"cre\")),\nperson(\"Lin\", \"Liu\",\nemail = \"linliu@sjtu.edu.cn\",\nrole = \"aut\"))", "Description": "Implements Higher-Order Influence Function (HOIF)\nestimators of the Average Treatment Effect (ATE), following\nRobins et al. (2008) , Liu et\nal. (2017) and Liu and Li\n(2023) . Estimators of any order\nare supported, with optional covariate basis transformations\n(B-splines, Fourier) and optional K-fold sample splitting\n(cross-fitting) for improved finite-sample performance. The\ncore higher-order U-statistics are computed exactly via the\n'ustats' package, an R interface to the 'Python' package\n'u-stats'; the underlying algorithm and its computational\ncomplexity are analyzed in Chen, Zhang and Liu (2025)\n. A pure R implementation (up to\norder 6) is also provided as a fallback that does not require\n'Python'.", "License": "MIT + file LICENSE", "Encoding": "UTF-8", "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)\nwith the 'u-stats', 'numpy' and 'torch' packages (provisioned\nautomatically on first use via 'reticulate', or via\nustats::setup_ustats()). 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Basis Expansion", "Sample Splitting (Cross-Fitting)", "Regularized Gram Matrix Inversion", "Pure R Backend", "Computational Details", "Python Backend (ustats)", "Pure R Implementation", "Performance Considerations", "Practical Recommendations", "Choosing the Transformation Method", "Choosing the Order", "Use a GPU if Available", "Troubleshooting", "Python Backend Issues", "Numerical Instability", "Extreme Propensity Scores", "References" ], "created": "2026-06-24 08:40:10", "modified": "2026-06-24 08:40:10", "commits": 1 } ], "_score": 2, "_indexed": true, "_nocasepkg": "hoif", "_universes": [ "cran", "cxy0714" ], "_binaries": [ { "r": "4.7.0", "os": "linux", "version": "0.2.0", "date": "2026-06-24T13:24:19.000Z", "distro": "resolute", "commit": "c28d25f48384cf893a0653da1cca0bd86fb67eb3", "fileid": "62cfc7e3da699e8ac81a5ee2d263b38b3052a13b22e846f6b4ba974b761fd7ad", "status": "success", "check": "OK", "buildurl": "https://github.com/r-universe/cran/actions/runs/28101429444" }, { "r": 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