PSR has been a global provider of technological solutions and consulting services in the areas of electricity and natural gas (E&G) since 1987.We specialize in the development of decision support tools for competitive electricity-gas markets, integrated economic/financial/market-design studies, strategic advice to investors and investment funds and integrated environmental and energy systems. PSR has clients in more than seventy countries in all five continents. Our client base includes E&G investors; regulators and other government agencies; dispatch centers / ISO's; banks and development agencies such as the World Bank and IADB. We have a multidisciplinary team of experts in the fields of energy economics, E&G systems modeling, electric power generation and transmission studies, environmental analysis, economic-financial studies, regulation, hydrology, statistics, and stochastic optimization. We develop customized solutions in close cooperation with the client's technical and IT groups. Our analytical and technological developments draw extensively from our in-house R&D (most of PSR staff are active contributors to international journals and workshops) and from a worldwide network of strategic partners in the E&G, financial, environmental and systems development areas.