Bibliographical references Aiginger, K. (2000): Europe´s position in quality competition, Enterprise DG Working Paper, Septiembre, European Commission, Enterprise Directorate General, http://www.pedz.uni-mannheim.de/daten/edzh/gdb/00/wp_quality.pdf . Aiginger, K. Y Landesmann, M. (2002): Competitive economic performance, Research Reports, Nº N° 291, noviembre, The Vienna Institute for Comparative Economic Studies. Artus, P. Y Cette, G. (2004): Productivité et croissance, La Documentation Française, París. Artus, P. Y Ricoeur-Nicolai, N. (1999): Quel système de change entre les pays d´Europe centrale et la zone d´Union monétaire, Le courrier des pays de l´Est, Nº N° 437, febrero. Cooper, C. (1995): Technology, manufactured exports and competitiveness, Global Forum on Industry. Perspectives for 2000 and beyond. Background Paper, 26 de septiembre, UNIDO. Economic Commission for Europe (2002): Technological activity in the ECE region during the 1990s, Economic Survey of Europe, 1, United Nations. Fontagné, L. ET AL. (1999): Les produits de haute technologie: une source d´asymétrie en Europe, La lettre du CEPII, Nº N° 179. Gordo, E., Moral, E. et al. (2004): Algunas implicaciones de la ampliación para la economía española, Documentos ocasionales, 0403, Banco de España. Graziani, G. (2002): Product quality upgrading in Central-Eastern countries and the coming EU enlargement, EU Enlargement to the CEECs: Trade Competition, Delocalisation of Production, and Effects on the Economies of the Union, Eds.: S. Baldone, F. Sdogati y L. Tajoli, Franco Angeli, Milan. Lall, S. (2002): Linking FDI and technology development for capacity building and strategic competitiveness, Transnational Corporations, Nº 3, diciembre, Vol. 11. Landesmann, M. (2002): Competitive economic performance, Research Reports, The Vienna Institute for Comparative Economic Studies. Mickiewicz, T. (2001): Structural convergence between accession countries and the EU. Reforms, income levels or specialisation, Papeles del Este. Transiciones poscomunistas, Nº 2, junio. Minondo, A. (2009): Especialización productiva y crecimientoen los países de renta media, Working Papers, 07/09, Instituto Complutense de Estudios Internacionales. Radosevic, S. (1998): The product structure of Central and Eastern European trade: The emerging patterns of change and learning, Electronic Working Papers Series, Nº N° 26, Science Policy Research Unit (SPRU).University of Sussex. Van Ark, B., O´Mahony, M. et al. (2003): The policy framework: Does the EU need a productivity agenda?, EU productivity and competitiveness: An industrial perspective, Eds.: Anonymous , European Commission.