In the context of current economic and financial crisis a comparative analysis of the main indices of economic and social performance of the EU member states is necessary. In such line of argument, the authors propose, as novelty, an economic power-economic performance matrix as a methodological...

The production of ethanol has increased in United States and Brazil in recent years, because of incentives to reduce gas consumption. In Brazil, there is a big program to use ethanol both as a single fuel or an additive to gas. In US, the incentive is to use ethanol combined to gas in proportion...