Silva, Armando; Afonso, Oscar; Africano, Ana Paula - In: Acta Oeconomica 63 (2013) June, pp. 157-184
–2004 based on the 4th Community Innovation Survey for Portugal. We estimated several Knowledge Production Functions, assuming … that knowledge outputs result from the combination of certain knowledge inputs with the flow of ideas coming from the … existing stock of knowledge. We found that the more internationally engaged firms create more knowledge output than their …