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>

It has been argued by several authors that the inflationary dynamics in Brazil follow a unit root process, thus displaying some inertia. Indeed, Cati, et al. (Journal of Applied Econometrics, 1999) have found that the inflationary dynamics in Brazil are nearly fully inertial. We estimate the...

In this paper we derive second- and third-order bias-corrected maximum likelihood estimates in general uniparametric models. We compare the corrected estimates and the usual maximum likelihood estimate in terms of their mean squared errors. We also obtain closed-form expressions for...

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 n-1 under the null hypothesis, where n is the sample size. In this paper we follow their...