Template-type: ReDIF-Paper 1.0 Author-Name: Bodas Freitas, Isabel Maria Author-Email: i.m.freitas@tue.nl Author-Workplace-Name: Grenoble Ecole de Management, and DISPEA Author-Name: Clausen, Tommy Author-Email: tommy.clausen@nforsk.no Author-Workplace-Name: University of Oslo, and Nordland Research Institute Author-Name: Fontana, Roberto Author-Email: roberto.fontana@unibocconi.it Author-Workplace-Name: University of Pavia, and CESPRI, Bocconi University Author-Name: Verspagen, Bart Author-Email: b.verspagen@algec.unimaas.nl Author-Workplace-Name: Maastricht University, and UNU-MERIT Title: Formal and informal external linkages and firms' innovative strategies. A cross-country comparison Abstract: Firms increasingly rely upon external actors for their innovation process. Interaction with these actors may occur formally (i.e. through a collaboration agreement) or informally (i.e. external actors acts as sources of knowledge). This paper analyses the reasons why firms consider it to be important to develop formal and informal external linkages in the innovation process by looking at the role played by firms' innovative strategies and by taking into account that a complementarity or substitutive relationship might exist between formal and informal linkages. Data come from the Third Community Innovation Survey (CIS 3), where we have access to firm level micro-data from Norway, Sweden, the Netherlands and the UK. Classification-JEL: O31, O33, O38 Keywords: External knowledge sources, Innovation strategy, Formal cooperation, Multinomial Probit Series: UNU-MERIT Working Papers Creation-Date: 2008 Number: 065 File-URL: http://www.merit.unu.edu/publications/wppdf/2008/wp2008-065.pdf File-Format: application/pdf File-Size: 275 Kb Handle: RePEc:unm:unumer:2008065