Estimators of vital events in dual-record systems

Dual-record system estimation has been widely used to obtain vital events in the past. Because of the weakness of the statistical assumptions of the model, as well as the biases involved in the estimators, its use became limited. The proposed estimators for dual-record systems are based on further division of the cells of the original table. The results have shown that they improved the underestimation of the total counts when compared with the classical Chandra Sekar-Deming estimator.