ERROS DE ESPECIFICAÇÃO NO MODELO DE REGRESSÃO BETA COM DISPERSÃO VARIÁVEL
Main Article Content
Abstract
Our goal with this article is to evaluate the effects of misspecifications in the inferences of the beta regression model with varying dispersion. For this, a simulation study was carried out. In these simulations, the response variable was generated with Beta distribution assuming known covariates and link functions, thus the model has been adjusted in the correct and incorrect specification, particularly considering six kinds of specification errors. We evaluate the effects of these errors through rejection rates and coverage rates in relation to one of the average submodel parameters and, in addition, we also evaluated the relative bias and the mean square error of the estimates mean responses. We verified from the results obtained, that the specification errors involving the linear predictor of the precision regression structure had a considerable influence on the model inferences. Finally, we performed an application to real data in order to compare the effects of different ways specification on the inferences of Beta regression model with varying dispersion.
Article Details
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).