Frailty models have emerged as a pivotal tool in survival analysis, offering a robust framework to account for unobserved heterogeneity and dependence between paired failure times. In bivariate ...

When two binary responses are measured for each study subject across time, it may be of interest to model how the bivariate associations and marginal univariate risks involving the two responses ...

In this lecture, the bivariate twin model is extended to the multivariate twin model. It is explained how the variance in four traits is decomposed into additive genetic, non-additive genetic, and ...