A multivariate hazard model for the study of child survival in Northeast Brazil was developed based on the expectation-maximization (EM) algorithm. The EM-based multilevel hazard model of child survival in Northeast Brazil provided corrected parameter estimates and standard errors including estimations of intragroup correlation of survival times at two hierarchical levels. Furthermore, standard errors were… Continue reading A nested frailty model for survival data, with an application to the study of child survival in Northeast Brazil