Inference about regression parameters using highly stratified survey count data with over-dispersion and repeated measurements

S. Wang, N. G. Cadigan and H. P. Benoît

Journal of Applied Statistics, 2017, vol. 44, issue 6, 1013-1030

Abstract: We study methods to estimate regression and variance parameters for over-dispersed and correlated count data from highly stratified surveys. Our application involves counts of fish catches from stratified research surveys and we propose a novel model in fisheries science to address changes in survey protocols. A challenge with this model is the large number of nuisance parameters which leads to computational issues and biased statistical inferences. We use a computationally efficient profile generalized estimating equation method and compare it to marginal maximum likelihood (MLE) and restricted MLE (REML) methods. We use REML to address bias and inaccurate confidence intervals because of many nuisance parameters. The marginal MLE and REML approaches involve intractable integrals and we used a new R package that is designed for estimating complex nonlinear models that may include random effects. We conclude from simulation analyses that the REML method provides more reliable statistical inferences among the three methods we investigated.

Date: 2017
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DOI: 10.1080/02664763.2016.1191622

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