This paper assesses cost efficiencies of Brazilian public and private companies of water supply. To measure the efficiency, we used a stochastic frontier model derived from the translog family – a specification similar to a Cobb-Douglas including a quadratic term in log output. The model...

This article analyses the main determinants of income per capita based on a sample of 50 countries for the period 2005 to 2009, using multivariate statistics. The results show that institutional indicators (heterodox) have a greater impact on the welfare of the population than the traditional...

This article analyses the main determinants of income per capita based on a sample of 50 countries for the period 2005 to 2009, using multivariate statistics. The results show that institutional indicators (heterodox) have a greater impact on the welfare of the population than the traditional...

We test the assumption that the relation between sexual activity and wage is nonlinear, considering that the impact of sex on productivity and therefore on wage occurs during a certain interval of times which one cannot perceive if discrimination is not done. In other words, we must use...

Based on a sample of drivers in Brasilia's streets, this article investigates whether distraction explains traffic accidents. A probit model is estimated to determine the predictive power of several variables on traffic accidents. The main conclusion drawn from this study is that the proxies...