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The spatial distribution of innovative activity in U.S.Met-ropolitan areas:Evidence from patent data. LIM U. Journal of RegionalAnalysis and Policy . 2003
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The role of National Productivity Organizations in Facili-tating Innovation. HEAPS J. Management Services . 2001
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Innovation regional planning and latent dimensions: the case of the Algarve region[J] .  The Annals of Regional Science . 2010 (2)