Silva, Armando; Africano, Ana Paula; Afonso, Oscar - Faculdade de Economia, Universidade do Porto - 2009
-2004 through the use of the fourth Portuguese Community Innovation Survey. We estimated several Knowledge Production Functions … assuming that knowledge outputs result from the combination of some knowledge inputs with the flow of ideas coming from … existing stock of knowledge. We found that more internationally exposed firms create more knowledge output, than their domestic …