Cross-Validation for Multi-Population Mortality Models R package CvmortalityMult version 1.1.1 Implementation of cross-validation method for testing the forecasting accuracy of several multi-population mortality models. The family of multi-population includes several multi-population mortality models proposed through the actuarial and demography literature. The package includes functions for fitting and forecast the mortality rates of several populations. Additionally, we include functions for testing the forecasting accuracy of different multi-population models. References, <https://journal.r-project.org/articles/RJ-2025-018/>. Atance, D., Debon, A., and Navarro, E. (2020) <doi:10.3390/math8091550>. Bergmeir, C. & Benitez, J.M. (2012) <doi:10.1016/j.ins.2011.12.028>. Debon, A., Montes, F., & Martinez-Ruiz, F. (2011) <doi:10.1007/s13385-011-0043-z>. Lee, R.D. & Carter, L.R. (1992) <doi:10.1080/01621459.1992.10475265>. Russolillo, M., Giordano, G., & Haberman, S. (2011) <doi:10.1080/03461231003611933>. Santolino, M. (2023) <doi:10.3390/risks11100170>. Software Depends: R (>= 3.50) Imports: StMoMo, forecast, gnm (>= 1.1-2), tmap, sf, graphics Suggests: testthat (>= 3.0.0) David Atance <david.atance@uah.es> Comprehensive R Archive Network (CRAN) David Atance [aut, cre] (ORCID: <https://orcid.org/0000-0001-5860-0584>), Ana Debón [aut] (ORCID: <https://orcid.org/0000-0002-5116-289X>) MIT + file LICENSE (https://CRAN.R-project.org/package=CvmortalityMult/LICENSE) 2025-11-27 application/tgz https://CRAN.R-project.org/package=CvmortalityMult doi:10.32614/CRAN.package.CvmortalityMult