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The impact of patent protection, economy openness and national culture on R&D investment: a cross-country empirical investigation[J] . Nikos C. Varsakelis.Research Policy . 2001 (7)
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How effective are fiscal incentives for R&D? A review of the evidence[J] . Bronwyn Hall,John Van Reenen.Research Policy . 2000 (4)
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Is public R&D a complement or substitute for private R&D? A review of the econometric evidence[J] . Paul A. David,Bronwyn H. Hall,Andrew A. Toole.Research Policy . 2000 (4)
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Determinants of patent rights: A cross-national study[J] . Juan C. Ginarte,Walter G. Park.Research Policy . 1997 (3)
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Standing on the Shoulders of Giants: Cumulative Research and the Patent Law[J] . Suzanne Scotchmer.The Journal of Economic Perspectives . 1991 (1)