This paper aims to bring into attention the concept of renewable energy investments’ efficiency and to study one of the three concepts related to it, namely environmental efficiency of investments in renewable energy. The analysis is undertaken at macroeconomic level for several countries in...

This paper's aim is to examine the relationship between energy consumption by fuel end economic growth in a comparative analysis for Spain, Romania and European Union. Applying a methodology in three steps on data for the 1990–2010 period, long-run and short-run relationships are revealed. On...