Manuel Martins Universidade do Porto, Faculdade de Economia   Rua Dr Roberto Frias 4200 464 Porto, Portugal   mmfmartins@fep.up.pt   http://www.fep.up.pt   Biographical Sketch: born 29 november 1964 undergraduate degree Universidade do Porto 1987 master of science Universidade do Porto 1996 phd student 1998- assistant researcher   Primary Research Focus: macroeconomics, monetary policy, trend-cycle decompositions   JEL Areas: Q2 : Renewable Resources and Conservation: General Q5 : Environmental Economics: General