We address the issue of constructing prediction intervals for responses that assume values in the standard unit interval, <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$$(0,1)$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <mrow> <mo stretchy="false">(</mo> <mn>0</mn> <mo>,</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> </math> </EquationSource> </InlineEquation>. The response is modeled using the class of beta regression models and we introduce percentile and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$$\hbox {BC}_a$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <msub> <mtext>BC</mtext> <mi>a</mi> </msub> </math> </EquationSource> </InlineEquation> (bias-corrected...</equationsource></equationsource></inlineequation></equationsource></equationsource></inlineequation>

This letter shows how to extend a number of published results on Bartlett and Bartlett-type corrections to likelihood ratio and score test for the test of linear restrictions in regression models. A few applications and simulation results are also presented.

We propose two new residuals for the class of beta regression models, and numerically evaluate their behaviour relative to the residuals proposed by Ferrari and Cribari-Neto. Monte Carlo simulation results and empirical applications using real and simulated data are provided. The results favour...

El estuario del río Gallegos constituye un área de importancia mundial para las aves playeras migratorias, lo cual permite desarrollar el turismo ornitológico, modalidad amigable con el ambiente, pero requiere una cuidadosa planificación, que compatibilice el disfrute de los usuarios y la...

Under suitable regularity conditions, an improved score test was derived by Cordeiro and Ferrari (1991). The test is based on a corrected score statistic which has a chi-squared distribution to order 1/n under the null hypothesis, where n is the sample size. In this paper we follow their...

Se trabajó en dos localidades de Patagonia Austral (Argentina): 28 de Noviembre y Río Gallegos, las que poseen una importante riqueza avifaunística, con especies de interés para fomentar el turismo ornitológico. A fin de poner en valor estos elementos y desarrollar nuevos productos...