Eduardo Ley IMF   International Monetary Fund 700 19th Street NW Washington, DC 20431 USA   eley@imf.org   http://www.terra.es/personal2/eduley   Biographical Sketch: Senior Economist, Research Dept, IMF. Previous positions: [96-98] Senior Research Fellow at FEDEA (Madrid), [94-96] Research Fellow at RFF (Washington, DC), [92-94] Assistant Professor Universidad Carlos III de Madrid. Education: PhD Economics U of Michigan 1991. MA Statistics, U of Michigan 1988. Licenciado Economicas U Complutense 1984.   Primary Research Focus: Public Economics, Bayesian Econometrics, Price Indexes   JEL Areas: D6 : Welfare Economics: General C1 : Econometric and Statistical Methods: General