Abstract
Tweedie's Compound Poisson model is a popular method to model data with probability mass at zero and non-negative, highly right-skewed distribution. Motivated by wide applications of the Tweedie model in various fields such as actuarial science, we investigate the grouped elastic net method for the Tweedie model in the context of the generalized linear model. To efficiently compute the estimation coefficients, we devise a two-layer algorithm that embeds the blockwise majorization descent method into an iteratively re-weighted least square strategy. In together with the strong rule, the proposed algorithm is implemented in an easy-to-use R package HDtweedie, and is shown to compute the whole solution path very efficiently. Simulations are conducted to study the variable selection and model fitting performance of various lasso methods for the Tweedie model. The modeling applications in risk segmentation of insurance business are illustrated by analysis of an auto insurance claim dataset. Supplementary materials for this article are available online
Publication Date
2016
Document Type
Article
Department, Program, or Center
School of Mathematical Sciences (COS)
Recommended Citation
Qian, Wei; Yang, Yi; and Zou, Hui, "Tweedie's Compound Poisson Model with Grouped Elastic Net" (2016). Journal of Computational and Graphical Statistics, forthcoming. Accessed from
https://repository.rit.edu/article/1802
Campus
RIT – Main Campus
Comments
This is an Accepted Manuscript of an article published by Taylor & Francis in the Journal of Computational and Graphical Statistics on March 6, 2015 , available online: http://www.tandfonline.com/10.1080/10618600.2015.1005213