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Entrepreneurship, entry and performance of new businesses compared in two growth regimes: East and West Germany. Fritsch,Michael. Journal of Evolutionary Economics . 2004
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Innovation in regions: What does really matter?[J] . Patrick Rondé,Caroline Hussler.  Research Policy . 2005 (8)
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Economic welfare and the allocation of resources for invention. Arrow,K.J. The Rate of Direction of Inventive Activity . 1962
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Economics of Technical Change. Edwin Mansfield,Elizabeth Mansfield. . 1993
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Spatial knowledge spillovers and university research:Evidence from Austria. Manfred Fischer,Attila Varga. The annals ofregional science . 2003
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An Empirical Study of Innovation,Entry and Diffusion in Industrial Clusters. Baptista R. . 1997
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Patent statistics as a measure of technical change. Comanor,W. S.,Scherer,F. M. Journal of Politics . 1969
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Spatial knowledge spillovers and university research: Evidence from Austria[J] . Manfred M. Fischer,Attila Varga.  The Annals of Regional Science . 2003 (2)