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2. Audretsch, David B & Vivarelli, Marco, 1996. " Firms Size and R&D Spillovers: Evidence from Italy," Small Business Economics, Springer, vol. 8(3), pages 249-58, June.
3. Ciccone, Antonio & Hall, Robert E, 1996. "Productivity and the Density of Economic Activity," American Economic Review, American Economic Association, vol. 86(1), pages 54-70, March. [Downloadable!] (restricted)
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   • Ciccone, A. & Hall, R.E., 1993. "Productivity and the Density of Economic Activity," Papers e-93-6, Stanford - Hoover Institution.
   • Antonio Ciccone & Robert E. Hall, 1996. "Productivity and the Density of Economic Activity," NBER Working Papers 4313, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
   • Antonio Ciccone & Robert E. Hall, 1995. "Productivity and the Density of Economic Activity," Economics Working Papers 120, Department of Economics and Business, Universitat Pompeu Fabra. [Downloadable!]
4. Tether, B. S. & Smith, I. J. & Thwaites, A. T., 1997. "Smaller enterprises and innovation in the UK: the SPRU innovations database revisited," Research Policy, Elsevier, vol. 26(1), pages 19-32, March. [Downloadable!] (restricted)
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6. Stefano Breschi & Francesco Lissoni, 2001. "Knowledge spillovers and local innovation systems: a critical survey," LIUC Papers in Economics 84, Cattaneo University (LIUC). [Downloadable!]
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   • Breschi, Stefano & Lissoni, Francesco, 2000. "Knowledge Spillovers And Local Innovation Systems: A Critical Survey," ERSA conference papers ersa00p362, European Regional Science Association. [Downloadable!]
   • Breschi, Stefano & Lissoni, Francesco, 2001. "Knowledge Spillovers and Local Innovation Systems: A Critical Survey," Industrial and Corporate Change, Oxford University Press, vol. 10(4), pages 975-1005, December.
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   • April Mitchell Franco & Darren Filson, 2000. "Knowledge Diffusion through Employee Mobility," Claremont Colleges Working Papers 2000-61, Claremont Colleges. [Downloadable!]
9. Carlino, Gerald A. & Chatterjee, Satyajit & Hunt, Robert M., 2007. "Urban density and the rate of invention," Journal of Urban Economics, Elsevier, vol. 61(3), pages 389-419, May. [Downloadable!] (restricted)
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   • Gerald Carlino & Satyajit Chatterjee & Robert Hunt, 2006. "Urban density and the rate of invention," Working Papers 06-14, Federal Reserve Bank of Philadelphia. [Downloadable!]
10. Kaiser, Ulrich, 2002. "Measuring knowledge spillovers in manufacturing and services: an empirical assessment of alternative approaches," Research Policy, Elsevier, vol. 31(1), pages 125-144, January. [Downloadable!] (restricted)
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    • Kaiser, Ulrich, 1999. "Measuring Knowledge Spillovers in Manufacturing and Services: An Empirical Assessment of Alternative Approaches," ZEW Discussion Papers 99-62, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research. [Downloadable!]
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1. Raquel Ortega-Argilés & Marco Vivarelli & Peter Voigt, 2009. "R&D in SMEs: a paradox?," Small Business Economics, Springer, vol. 33(1), pages 3-11, June. [Downloadable!] (restricted)