Prediction Intervals for Quantile Autoregression R package qarPI version 0.1.0 Provides prediction intervals for classical homoscedastic autoregressive models (AR(p)) and quantile autoregressive models (QAR(p)). The package implements percentile-based and predictive-root-based bootstrap procedures for constructing multi-step-ahead prediction intervals. For more details, see Novo and Sanchez-Sellero (2025) <doi:10.48550/arXiv.2512.22018>. Software Imports: stats, quantreg Silvia Novo <snovo@est-econ.uc3m.es> Comprehensive R Archive Network (CRAN) Silvia Novo [aut, cre], César Sánchez-Sellero [aut] GPL-3 2026-04-21 application/tgz https://CRAN.R-project.org/package=qarPI doi:10.32614/CRAN.package.qarPI