This article investigates the history of proposals to use vegetable oils as fuel in Brazil beginning in the 1920s up to the current National Program for Biodiesel Production and Use – PNPB. The characteristics of vegetable oils markets and of the oil products market, as well as the incentive...

This paper deals with the epistemologic problem of searching for experimental evidences of a particular economic model theory. The difficulties of such tasks are well-known due to the peculiarities of the economic system, mainly related to the non-repetitiousness of experiments. Thus, indirect...

Programs regarding to energy saving in Brasil arised by the early 80's, from the concern with oil products consumption. The situation has changed and electricity is growing in importance when energy conservation is discussed.

This work presents an economic analysis of water pumping by small photovoltaic and gasoline systems for irrigation in the semi-arid region of northeastern Brazil, were electrification achives only 15% of rural houses. Farms are characterized by small areas where rain water availability is quite...