extrafrail (version 1.14)
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 and Jorgensen-Seshadri-Whitmore 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)
and Gallardo et al. (2025) .