4. Energy/Capital is Negatively Correlated with GDP per Capita

I've blogged about the energy capital ratio before. Here is a snapshot for 85 non-oil producing countries in 2007:



There is a much stronger relationship here than for energy intensity... This suggests that this indicator is maybe closer to a measure of true energy efficiency. Astrid Kander shows that the inverse - capital/energy - it also has risen over long-run: