extrafrail (version 1.13)
Estimation and Additional Tools for Alternative Shared Frailty
Models
Description
Provide estimation and data generation tools for some 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 and
generalized exponential as the distribution for the 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 and Bourguignon (2025) and
Gallardo et al. (2024) .