A bootstrap algorithm proposed by Psaradakis (2001) for hypothesis testing in I(1) regressions is discussed and shown to be valid only under the null hypothesis. A simple correction making the procedure valid under both the null and the alternative hypothesis is proposed.

Este trabalho tem como objectivo a realização de uma analise da economia brasileira, em 1960-2000, numa perspectiva sectorial. Os modelos econometricos e o teste de causalidade de Hausman mostram que o incremento da produção manufactureira e necessario para lograr um desenvolvimento...

We estimate DEA (Data Envelopment Analysis) technical efficiency scores for 1170 Brazilian hospitals included in the SUS (Central Health System) using a recently proposed method that combines bootstrap and jackknife resampling to eliminate the influence of outliers and possible measurement and...