A new integrated likelihood for estimating population size in dependent dual-record system

by   Kiranmoy Chatterjee, et al.

Efficient estimation of population size from dependent dual-record system (DRS) remains a statistical challenge in capture-recapture type experiment. Owing to the nonidentifiability of the suitable Time-Behavioral Response Variation model (denoted as M_tb) under DRS, few methods are developed in Bayesian paradigm based on informative priors. Our contribution in this article is in developing integrated likelihood function from model M_tb based on a novel approach developed by Severini (2007, Biometrika). Suitable weight function on nuisance parameter is derived under the assumption of availability of knowledge on the direction of behavioral dependency. Such pseudo-likelihood function is constructed so that the resulting estimator possess some desirable properties including invariance and negligible prior (or weight) sensitiveness. Extensive simulations explore the better performance of our proposed method in most of the situations than the existing Bayesian methods. Moreover, being a non-Bayesian estimator, it simply avoids heavy computational effort and time. Finally, illustration based on two real life data sets on epidemiology and economic census are presented.


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