Many international organizations have called for an increased usage of renewable energy as a means to reduce CO2 emissions and address climate change. This paper uses a large panel data set of 117 countries and recently developed panel estimation techniques to answer the question by how much...

Energy efficiency is essential for reducing energy consumption, increasing energy security, and reducing CO2 emissions. This paper uses stochastic frontier analysis applied to a large panel data set of 81 OECD and non-OECD countries covering the years 1980 to 2013 to estimate energy efficiency....