Given that norms govern individual behaviour, which in turn are related to the environmental behaviour, this study provides empirical evidence of the link between human behaviour and the environment. Firstly with the use of robust frontiers the eco-efficiency ratios of 72 countries are...

Finite mixture models provide a mathematical basis for the statistical modeling of a wide variety of random situations, and their importance for the statistical analysis of data is well documented. This article focuses on a finite mixture regression model and develops an estimator of the...

The Brazilian Public School Math Olympics (Olimpíada Brasileira de Matemática das Escolas Públicas, or OBMEP) has been held yearly since 2005, aiming at motivating students to study Mathematics and improving basic education. In this paper we evaluate the OBMEP´s impact on school performance...

Minimum distance techniques have become increasingly important tools for solving statistical estimation and inference problems. In particular, the successful application of the Hellinger distance approach to fully parametric models is well known. The corresponding optimal estimators, known as...

Most of the efficiency studies of large multinational banks operating in different countries calculate banks' inefficiency levels without taking into account the environmental factors in which they are operating in. As a result the estimated inefficiencies are subject to a combination of true...

Control charts are one of the widest used techniques in statistical process control. In Phase I, historical observations are analysed in order to construct a control chart. Because of the existence of multiple outliers that are undetected by control charts such as Hotelling's T2 due to the...