Energetic inputs are essential and have few substitutes. The energy consumption is associated to households’ well-being and is needful in any productive process. The economic growth and development of non-OECD countries is causing modification in households’ structure of demand and in the production structure through technical progress, which changes the demand by the different energy inputs. In this context, this thesis goal is to access how the changes in the elements associated to the demand, i.e. households’ demand and production structure, impact the use of energy in developing countries (Brazil, China and India) and in developed countries (Germany, United Kingdom and United States). To achieve such objective we used input-output matri...