extrafrail (version 1.15)
Estimation and Additional Tools for Alternative Shared Frailty
Models
Description
Provide estimation and data generation tools for new multivariate frailty models.
This version includes the gamma, inverse Gaussian, weighted Lindley, Birnbaum-Saunders,
truncated normal, mixture of inverse Gaussian, mixture of Birnbaum-Saunders,
generalized exponential, Jorgensen-Seshadri-Whitmore, weighted Akash, weighted Shanker and
weighted Sujatha as the distribution for frailty terms. For the basal model, it
is considered a parametric approach based on the exponential, Weibull and the
piecewise exponential distributions as well as a semiparametric approach. For
details, see Gallardo et al. (2024) ,
Gallardo et al. (2025) , Kiprotich et al. (2025) ,
Gallardo et al. (2025) , Kiprotich et al. (2026)