References Anselin, L. (1988). Spatial Econometrics: Methods and Models. Kluwer Academic Publishers, Boston. Anselin,L., Florax, R.J.G.M. and Rey, S.J. (Eds.) (2004). Advances in Spatial Econometrics: Methodology, Tools and Applications. Springer, Berlin. Barro, R.J. and Sala-i-Martin, X. (1995). Economic Growth. McGraw Hill, Boston. Beckstead, D. and Brown, W.M. (2003). From Labrador City to Toronto: The industrial Diversity of Canadian Cities, 1992 to 2002. Insights on the Canadian Economy, 3. Statistics Canada (Ed.), Ontario. Blien, U., Suedekum, J. and Wolf, K. (2005). Local Employment Growth in West Germany: A Dynamic Panel Approach. IZA Discussion Paper No. 1723. Boix, R. and Galleto, V. (2006). Identificación de Sistemas Locales de Trabajo y Distritos Industriales en España. Dirección General de Política de la Pequeña y Mediana Empresa, Ministerio de Industria, Comercio y Turismo. Boix, R., Veneri, P. and Almenar, V (2012). Polycentric Metropolitan Areas in Europe: Towards a Unified Proposal of Delimitation. In Fernández, E. and Rubiera, F. (eds): New Challenges from Data at Local Level. Defining the Spatial Scale in Modern Regional Analysis. Advances in Spatial Science. Springer. Christaller, W. (1935). Die Zentralen Orte in Süddeutschland. Fischer. Cliff, A.D. and Ord, J.K. (1981). Spatial Processes: Models and Applications. Pion, London. CNIG (2001). Mapas Digitales de los Municipios Españoles. Centro Nacional de Información Geográfica, Ministerio de Fomento. Coffey W. J. and M. Polèse (1988). Locational Shifts in Canadian Employment, 1971- 1981: Decentralization vs. Decongestion. The Canadian Geographer, 32 (3), pp. 248-256. Coffey, W.J. and R. Shearmur (1996). Employment Growth and Change in the Canadian Urban System. Canadian Policy Research Networks, Ottawa. Cooke, P., Heindenreich, M. and Braczyk, H. J. (2004). Regional Innovation Systems: The Role of Governance in a Globalized Word. Routledge, London. Davis, D.R. and Weinstein, D.E. (2002). Technological Superiority and the Losses from Migration. NBER Working Paper No. 8971. Doloreux, D., Shearmur, R. and Filion, P. (2001). Learning and Innovation: Implications for Regional Policy. An Introduction. Canadian Journal of Regional Science, 24 (1), pp. 5-11. Eisinger, P.K. (1988). The Rise of the Entrepreneurial State: State and Local Economic Development Policy in the United States. The University of Winsconsin Press, Madison. Florida, R. (2002). The Rise of the Creative Class. Basic Books, New York. Fox, K.A. and Kumar, T.K. (1965). The Functional Economic Area: Delineation and Implications for Economic Analysis and Policy. Papers in Regional Science, 15 (1), pp. 57-85. Freeman, D.G. (2001). Sources of Fluctuation in Regional Growth. The Annals of Regional Science, 35 (2), pp. 294-266. Galaway, B. and Hudson, J. (Eds.) (1994). Community Economic Development: Perspectives on Research and Policy. Thompson, New York. Griffith, D.A. (1988). Advanced Spatial Statistics: Special Topics in the Exploration of Quantitative Spatial Series. Kluwer, Dordrecht. Griffith, D.A. (2003). Spatial Autocorrelation and Spatial Filtering: Gaining Understanding Through Theory and Scientific Visualization. Springer, New York. Haining, R. (1990). The Use of Added Variable Plots in Regression Modelling with Spatial Data. The Professional Geographer , 42, pp. 336-44. Henderson, V. (2003). Marshall’s Scale Economies. Journal of Urban Economics, 53, pp. 1-28. Hummels, D. (1999). Have International Transportation Cost Declined? University of Chicago. Graduate School of Business. INE (2007): Censo de Población, 2001. Instituto Nacional de Estadística (http://www.ine.es). INE (1992): Censo de Población, 1991. Instituto Nacional de Estadística (http://www.ine.es). Jacobs, J. (1984). Cities and the Wealth of Nations. Vintage, New York. Keating, M. (1993). The Politics of Modern Europe: The State and Political Authority in the Major Democracies. Edward Elgar, Aldershot. Krugman, P. R. (1995). Development, Geography, and Economic Theory. The MIT press, Cambridge. Lösch, A. (1938). The Nature of Economic Regions. Southern Economic Journal, 5 (1), pp. 71-78. Mackay, R.R. (2003). Twenty-five Years of Regional Development. Regional Studies, 37 (3), pp. 303-317. Malecki, E. and Oinas, P. (1999). Making Connections. Technological Learning and Regional Economic Change. Ashgate, Aldershot. Markusen, A. (1996).Sticky Places in Slippery Space: A Typology of Industrial Districts. Economic Geography, 72 (3), pp. 293-313. Markusen, A. (1999). Fuzzy Concepts, Scanty Evidence, Policy Distance: The Case for Rigour and Policy Relevance in Critical Regional Studies. Regional Studies, 33 (9), pp. 869-884. Martin, R. and Sunley, P. (1998). Slow Convergence? The New Endogenous Growth Theory and Regional Development. Economy Geography, 74, pp. 201-227. Massey, D.B. (1995). Spatial Divisions of Labor: Social Structures and the Geography of Production. Routledge, New York. Meyer, J.R. (1963). Regional Economics: A Survey. American Economic Review, 53, pp. 19-54. Parr, J. (2001). Regional Economic Planning: Learning from Past Experience. In Felsenstein, D., McQuaid, R., McCann, P., and Shefer, D. (Eds.) Public Investment and Regional Economic Development. Edward Elgar. Parr, J. (2002). Agglomeration Economies: Ambiguities and Confusions. Environment and Planning A, 34, pp. 717-731. Parr, J. (2005). Cities and Regions: Problems and Potentials. Environment and Planning A, 40, pp. 3009-3026. Partridge, M.D. and Rickman, D.S. (2006). The Geography of American Poverty: Is There a Role for Place Based Policy? W.E. Upjohn Employment Institute. Partridge, M.D., Rickman, D.S., Ali, K. and Olfert, M.R. (2008). Lost in Space: Population Growth in the American Hinterlands and Small Cities. Journal of Economic Geography, 8, pp. 727–757. Partridge, M.D., Rickman, D.S., Ali, K. and Olfert, M.R. (2009). Agglomeration Spillovers and Wage and Housing Cost Gradients across the Urban Hierarchy. Journal of International Economics, 78, pp. 126-140. Philo, C., Mitchell, R., and More, A. (1998). Reconsidering Quantitative Geography: The Things that Count. Environment and Planning A, 30 (2), pp. 191-201. Porter, M. (1990). The Competitive Advantage of Nations. The Free Press, New York. Porter, M. (1996). Competitive Advantage, Agglomeration Economies, and Regional Policy. International Regional Science Review, 19 (1-2), pp. 85-90. Porter, M. (1998). Competitive Strategy: Techniques for Analyzing Industries and Competitors. The Free Press, New York. Polèse, M. (2009). The Wealth and the Poverty of Regions: Why Cities Matters. University of Chicago Press, Chicago. Polèse, M. and Champagne, E. (1999). Location Matters: Comparing the Distribution of Economic Activity in the Mexican and Canadian Urban Systems. International Journal Science Review, 22 (1), pp. 102-132. Polèse, M. and Shearmur, R. (2004). Is Distance Really Dead? Comparing the Industrial Location Patterns over Time in Canada. International Regional Science Review, 27 (4), pp. 1-27. Polèse M., Shearmur, R. and Rubiera, F. (2006). Observing Regularities in Location Patterns. An Analysis of the Spatial Distribution of Economic Activity in Spain. European Urban & Regional Studies, 14 (2), pp. 157-180. Pritchett, L. (2001). Where Has All the Education Gone? The World Bank Economic Review, 15 (3), pp. 367-391. Quigley, J.M. (1998). Urban Diversity and Economic Growth. Journal of Economic Perspectives, 12 (2), pp. 127-138. Rappaport, J. and Sachs, J. D. (2003). The United States as a Coastal Nation. Journal of Economic Growth, 8, pp. 5-46. Romer, P. (1989). Human Capital and Growth: Theory and Evidence. NBER Working Paper, W3173. Rubiera, F. (2005). Ciudades, Crecimiento y Especialización Territorial: Dinámicas Espaciales de Concentración del Empleo y la Población en España. Colección de Estudios del CES. Consejo Económico y Social. Rubiera, F. and Viñuela, A. (2012). From Local Units to Economic regions in Spain. Where the Agglomeration Economies Make Sense. In Fernández, E. and Rubiera, F. (eds) New Challenges from Data at Local Level. Defining the Spatial Scale in Modern Regional Analysis. Advances in Spatial Science. Springer. Sforzi F., Openshaw S. and Wymer C. (1997) Le Procedura di Identificazione dei Sistemi Locali del Lavoro [The Procedure to Identify Local Labour Market Area], in Sforzi F. (Ed.) I Sistemi Locali del Lavoro 1991, pp. 235–242. ISTAT, Rome. Sforzi, F. and Lorenzini, F. (2002). I Distretti Industriali. L ́esperienza Italiana dei Distretti Industriali. Instituto per la Promozione Indistriale (IPI). Sforzi, F. (2012). From Administrative Spatial Units to Local Labour Market Areas. Some Remarks on the Unit of Investigation of Regional Economics with Particular Reference to the Applied Research in Italy. In Fernández, E. and Rubiera, F. (eds) New Challenges from Data at Local Level. Defining the Spatial Scale in Modern Regional Analysis. Advances in Spatial Science. Springer. Shearmur R. and Polèse, M. (2007). Do Local Factors Explain Local Employment Growth?: Evidence from Canada, 1971-2001. Regional Studies, 41 (4), pp. 453-471. Shearmur R. and Polèse, M. (2005). Diversity and Employment Growth in Canada, 1971-2001: Can Diversification Policies Succeed?. The Canadian Geographer, 49 (39), pp. 272-290. Smart, M.W. (1974). Labour Market Areas: Uses and Definition. Progress in Planning, 2, 238-353. Strambach, S. (2001). Innovation Processes and the Role of Knowledge-Intensive Business Services (KIBS). In K. Koschatzky, M. Kulicke and A. Zenker (Eds.) Innovation Networks – Concepts and Challenges in the European Perspective, Physica Verlag, pp. 53–68. Thünen. Von, J.H. (1826). Der Isolierte Staat in Beziehung auf Landwirtchaft und Nationalökonomie, Hamboug. Weber, A. (1929). Theory of the Location of Industries. [Translated by Friedrich, C.J. from Weber's 1909 book]. The University of Chicago Press. Zipf, G. K. (1949). Human Behaviour and the Principle of Least Effort: An Introduction to Human Ecology. Adison Wesley Press.