Comprehensive ARDL: Panel, Bootstrap and Fourier Methods R package ardlverse version 1.1.3 A unified framework for Autoregressive Distributed Lag (ARDL) modeling and cointegration analysis. Implements Panel ARDL with Pooled Mean Group (PMG), Mean Group (MG), and Dynamic Fixed Effects (DFE) estimators following Pesaran, Shin & Smith (1999) <doi:10.1002/jae.616>. Provides bootstrap-based bounds testing per Pesaran, Shin & Smith (2001) <doi:10.1002/jae.616>. Includes Quantile Nonlinear ARDL (QNARDL) combining distributional and asymmetric effects based on Shin, Yu & Greenwood-Nimmo (2014) <doi:10.1007/978-1-4899-8008-3_9>, and Fourier ARDL for modeling smooth structural breaks following Enders & Lee (2012) <doi:10.1016/j.econlet.2012.05.019>. Features include Augmented ARDL (AARDL) with deferred t and F tests, Multiple-Threshold NARDL for complex asymmetries, Rolling/Recursive ARDL for time-varying relationships, and Panel NARDL for nonlinear panel cointegration. All methods include comprehensive diagnostics, publication-ready outputs, and visualization tools. Software Depends: R (>= 4.0.0) Imports: stats, MASS, quantreg, lmtest, ggplot2, gridExtra, graphics, grDevices Suggests: testthat (>= 3.0.0), knitr, rmarkdown, covr Muhammad Abdullah Alkhalaf <muhammedalkhalaf@gmail.com> Comprehensive R Archive Network (CRAN) Muhammad Abdullah Alkhalaf [aut, cre] (ORCID: <https://orcid.org/0009-0002-2677-9246>), Merwan Roudane [ctb] (Original Stata implementations) GPL-3 2026-03-14 application/tgz https://CRAN.R-project.org/package=ardlverse doi:10.32614/CRAN.package.ardlverse