Jorge Islas,^*,** Fabio Manzini,^***,** Manuel Martínez<sup>****,**


*</sup>Jorge Islas has a BSc in physics and a MSc in energy engineering from the National University of Mexico (UNAM). He received a PhD in energy economics from the Institut d'Economie et Politique de l'Energie, CNRS, University of Grenoble, France. His research areas are energy economics, technical change in energy industries, energy planning and environmental assessment of energy technologies. His present position is associate researcher at the Centre for Energy Research at UNAM. jis@mazatl.cie.unam.mx
^**Their address: Centre for Energy Research, UNAM, Apartado Postal 34, 62580 Temixco, Morelos, Mexico.
^***Fabio Manzini has a BSc in physical engineering, a MSc and a PhD in energy engineering from the National University of Mexico (UNAM). Since 1981 his main interest has been renewable sources of energy, energy planning, energy end-use, environmental assessment of energy technologies and energy future scenarios. His present position is associate researcher in the Centre for Energy Research at UNAM. fmp@mazatl.cie.unam.mx
^****Manuel Martínez received a BSc in physics at the National University of Mexico (UNAM) and a PhD in physics from Oxford University. His research areas are energy engineering and planning. His present positions are senior researcher, lecturer, and director of the Centre for Energy Research at UNAM. He is a past president of the National Academy of Engineering of Mexico. marfe@servidor.unam.mx