Guerreiro, Raúl Filipe C.Rodrigues, Paulo M. M.Andraz, Jorge Miguel2014-07-082014-07-082011AUT: RGU01257; JAN00657;http://hdl.handle.net/10400.1/4724This article evaluates the existing relative degree of association among several developed economies, including Portugal. Using the Kalman fi lter the cyclical evolution of GDP in Portugal is compared with the cyclical evolution of GDP from several other economies of reference, such as the euro area, France, Germany, Greece, Ireland, Italy,Japan, Spain, the UK and the US.porjournal article