Package: iop
Type: Package
Title: Inflated Ordered Probit and Logit Models
Version: 0.1.0
Authors@R: person("Benjamin E.", "Bagozzi", email = "bagozzib@udel.edu",
    role = c("aut", "cre"))
Description: Estimation, inference, and quantities of interest for
        ordered probit and ordered logit models whose outcome contains
        an inflated category: a single ordered category (bottom,
        middle, top, or any other) that mixes observations generated by
        the ordered process with observations generated by a distinct
        split-population process. Fits the zero-inflated ordered probit
        of Harris and Zhao (2007) <doi:10.1016/j.jeconom.2007.01.002>
        and its middle- and top-inflated extensions (Bagozzi and
        Mukherjee 2012 <doi:10.1093/pan/mps020>; Bagozzi, Hill, Moore
        and Mukherjee 2015 <doi:10.1177/0022002713520530>; Bagozzi, Joo
        and Mukherjee 2024 <doi:10.1093/fpa/orae006>), generalized to
        an arbitrary inflated category and to the logit link, with
        optional correlated errors for the probit form, plus the
        standard ordered probit and logit and their partial
        proportional-odds (non-parallel) variants on the same footing.
        Provides analytic, robust, and cluster-robust standard errors,
        survey weights and offsets, model comparison (Vuong,
        likelihood-ratio, information criteria), regime-specific
        predicted probabilities and first differences, simulation for
        residual diagnostics, and tidy/table-package integration. The
        likelihood, its gradient, and the bivariate-normal
        probabilities are implemented in C++.
License: GPL-3
Encoding: UTF-8
LazyData: true
Depends: R (>= 4.0)
Imports: Rcpp, stats, graphics, methods, numDeriv, MASS
LinkingTo: Rcpp
Suggests: ordinal, VGAM, mvtnorm, pbivnorm, sandwich, DHARMa, testthat
        (>= 3.0.0), knitr, rmarkdown, broom, modelsummary, texreg,
        parallel, AER
VignetteBuilder: knitr
RoxygenNote: 7.3.3
Roxygen: list(markdown = TRUE, load = "source")
URL: https://github.com/bagozzib/iop, https://bagozzib.github.io/iop/
BugReports: https://github.com/bagozzib/iop/issues
Config/testthat/edition: 3
Repository: https://bagozzib.r-universe.dev
Date/Publication: 2026-09-03 22:58:32 UTC
RemoteUrl: https://github.com/bagozzib/iop
RemoteRef: HEAD
RemoteSha: c0f0039b7c1782d82cf527fbc1dffc7852f3aba2
NeedsCompilation: yes
Packaged: 2026-10-04 10:17:09 UTC; root
Author: Benjamin E. Bagozzi [aut, cre]
Maintainer: Benjamin E. Bagozzi <bagozzib@udel.edu>