Political Science Computational Laboratory R package pscl version 1.5.9 CRAN Task View: Bayesian (https://CRAN.R-project.org/view=Bayesian) CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) CRAN Task View: Environmetrics (https://CRAN.R-project.org/view=Environmetrics) CRAN Task View: Psychometrics (https://CRAN.R-project.org/view=Psychometrics) Bayesian analysis of item-response theory (IRT) models, roll call analysis; computing highest density regions; maximum likelihood estimation of zero-inflated and hurdle models for count data; goodness-of-fit measures for GLMs; data sets used in writing and teaching; seats-votes curves. Software Imports: MASS, datasets, grDevices, graphics, stats, utils Suggests: lattice, MCMCpack, car, lmtest, sandwich, zoo, coda, vcd, mvtnorm, mgcv Simon Jackman <simon.jackman@sydney.edu.au> Comprehensive R Archive Network (CRAN) Simon Jackman [aut, cre] (ORCID: <https://orcid.org/0000-0001-7421-4034>), Alex Tahk [ctb] (ORCID: <https://orcid.org/0000-0001-7895-9420>), Achim Zeileis [ctb] (ORCID: <https://orcid.org/0000-0003-0918-3766>), Christina Maimone [ctb] (ORCID: <https://orcid.org/0000-0002-0402-6297>), James Fearon [ctb], Zoe Meers [ctb] (ORCID: <https://orcid.org/0000-0001-8045-6531>) GPL-2 2024-01-31 application/tgz https://CRAN.R-project.org/package=pscl doi:10.32614/CRAN.package.pscl