Package: pcdreg
Type: Package
Title: Semiparametric Regression for Panel Count Data
Version: 0.1.0.9000
Authors@R: c(
    person("Dayu", "Sun", email = "dayusun@iu.edu",
           role = c("aut", "cre"),
           comment = c(ORCID = "0000-0002-7149-3303")),
    person("Yuanyuan", "Guo", role = "ctb",
           comment = "co-author of the method paper"),
    person("Yang", "Li", role = "ctb",
           comment = "co-author of the method paper"),
    person("Wanzhu", "Tu", role = "ctb",
           comment = "co-author of the method paper"),
    person("Jianguo", "Sun", role = "ctb",
           comment = "co-author of the method paper")
  )
Description: Fits semiparametric regression models to panel count data,
        that is, to recurrent event processes observed only at
        intermittent examination times, allowing covariates to be
        time-varying. The proportional rate model is fitted by
        nonparametric maximum likelihood through an
        expectation-maximization algorithm under a working Poisson
        assumption, while inference does not require that assumption to
        hold; two computationally inexpensive covariance estimators are
        provided, a robust sandwich estimator that remains consistent
        when the Poisson assumption fails and an efficient information
        estimator that is a fast substitute for profile likelihood when
        it holds, with the profile likelihood estimator available for
        comparison. The proportional means model is fitted by the
        estimating equation of Hu, Sun and Wei (2003)
        <doi:10.1111/1467-9469.00316>. Methods for the rate model are
        described in Sun, Guo, Li, Tu and Sun (2024)
        <doi:10.3150/23-BEJ1713>.
License: GPL (>= 2)
Encoding: UTF-8
Language: en-GB
Depends: R (>= 4.1.0)
Imports: Rcpp, cli, generics, ggplot2, rlang, stats, tibble
LinkingTo: Rcpp, RcppArmadillo
Suggests: testthat (>= 3.0.0), knitr, rmarkdown
VignetteBuilder: knitr
RoxygenNote: 7.3.3
Roxygen: list(markdown = TRUE)
URL: https://github.com/dayusun/pcdreg, https://www.sundayu.me/pcdreg/
BugReports: https://github.com/dayusun/pcdreg/issues
Config/testthat/edition: 3
NeedsCompilation: yes
Repository: https://dayusun.r-universe.dev
Date/Publication: 2026-11-10 16:48:43 UTC
RemoteUrl: https://github.com/dayusun/pcdreg
RemoteRef: HEAD
RemoteSha: d0dc0f492a2cf03e49117eca265d9e25cc8e75b6
Packaged: 2026-11-11 13:53:46 UTC; root
Author: Dayu Sun [aut, cre] (ORCID: <https://orcid.org/0000-0002-7149-3303>),
  Yuanyuan Guo [ctb] (co-author of the method paper),
  Yang Li [ctb] (co-author of the method paper),
  Wanzhu Tu [ctb] (co-author of the method paper),
  Jianguo Sun [ctb] (co-author of the method paper)
Maintainer: Dayu Sun <dayusun@iu.edu>