{ "_id": "6a43c88e58db26aa3c35b49d", "Package": "fibr", "Type": "Package", "Title": "Prior-Fraction Diagnostics for Hierarchical Models", "Version": "0.1.1", "Authors@R": "person(\"Aidan D\", \"Bindoff\",\nemail = \"aidan.bindoff@utas.edu.au\",\nrole = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0002-0943-2702\"))", "Description": "Computes the prior fraction, the per-group pooling factor\nof Gelman and Pardoe (2006) ,\nfor hierarchical models, including directly from 'brms' fits.\nFor each group-level coefficient the prior fraction is the\nshare of the posterior precision contributed by the prior\nrelative to the likelihood; values near one indicate a\ncoefficient that is prior-dominated (the centring/non-centring\nfunnel regime), values near zero indicate a\nlikelihood-dominated coefficient that is well identified from\nthe data. These quantities are invisible to standard\nconvergence diagnostics such as R-hat and effective sample\nsize, and they indicate where a non-centred reparameterisation\nis likely to help. A companion advisor reports the same\ndecomposition for changepoint random effects fitted with\n'smoothbp'. The underlying geometry (the Fisher-metric\nconnection on the base-fiber split, for which this connection\nis flat so the obstruction is statistical rather than\ngeometric) is described in Bindoff (2026)\n; code reproducing the paper is in\nthe package's source repository.", "License": "MIT + file LICENSE", "URL": "https://github.com/ABindoff/fibr,\nhttps://doi.org/10.5281/zenodo.20724550", "BugReports": "https://github.com/ABindoff/fibr/issues", "Encoding": "UTF-8", "Roxygen": "list(markdown = TRUE)", "RoxygenNote": "7.3.3", "Additional_repositories": "https://stan-dev.r-universe.dev", "Config/testthat/edition": "3", "Config/rextendr/version": "0.5.0", "SystemRequirements": "Cargo (Rust's package manager), rustc >= 1.65.0, xz", "Config/pak/sysreqs": "xz-utils libclang-dev", "Repository": "https://abindoff.r-universe.dev", "Date/Publication": "2026-06-23 05:46:48 UTC", "RemoteUrl": "https://github.com/abindoff/fibr", "RemoteRef": "HEAD", "RemoteSha": 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"Aidan Bindoff ", "message": "Clarify pooling-factor terminology and add references throughout\n\n- Rename pi_j description to \"Gelman-Pardoe pooling factor\"; note that\n 1 - pi_j is the shrinkage factor (they are distinct quantities)\n- Update DESCRIPTION, NEWS.md, README.md, R docs, and inst/CITATION\n consistently with the revised terminology\n- inst/CITATION: update paper title to \"...The Pooling Factor...\"\n- README.md: add Papaspiliopoulos/Tan-Nott closed-form weight note;\n expand background paragraph with Amari/Cox-Reid/Shima foliation context\n- smoothbp_advisor(): add @references block (Gelman-Pardoe, P-R-S, Tan-Nott)\n\nCo-Authored-By: Claude Sonnet 4.6 \n", "time": 1782193608 }, "_maintainer": { "name": "Aidan D Bindoff", "email": "aidan.bindoff@utas.edu.au", "login": "abindoff", "description": "Statistician and data scientist in dementia research. \nTwitter: @ABindoff", "uuid": 13143142, "orcid": "0000-0002-0943-2702" }, "_registered": true, "_dependencies": [ { 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