A new approach to modeling positive random variables with repeated measures

João Victor B. de Freitas, Juvêncio S. Nobre, Marcelo Bourguignon and Manoel Santos-Neto

Journal of Applied Statistics, 2022, vol. 49, issue 15, 3784-3803

Abstract: In many situations, it is common to have more than one observation per experimental unit, thus generating the experiments with repeated measures. In the modeling of such experiments, it is necessary to consider and model the intra-unit dependency structure. In the literature, there are several proposals to model positive continuous data with repeated measures. In this paper, we propose one more with the generalization of the beta prime regression model. We consider the possibility of dependence between observations of the same unit. Residuals and diagnostic tools also are discussed. To evaluate the finite-sample performance of the estimators, using different correlation matrices and distributions, we conducted a Monte Carlo simulation study. The methodology proposed is illustrated with an analysis of a real data set. Finally, we create an $ \texttt {R} $ R package for easy access to publicly available the methodology described in this paper.

Date: 2022
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DOI: 10.1080/02664763.2021.1963422

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