Machines, energy and economic growth : Energy Capital ratios in Europe and Latin America 1875 - 1970
The relationship between energy and capital is one of the most important relationships of modern economic growth. Machines need energy to produce all the goods we enjoy; energy without machinery is useless. However, the great majority of the economic models do not take into account the elasticities of substitution (or complementaries) between these two main variables. Actually, energy is absent in