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Does an R&D tax credit affect R&D expenditure? The Japanese R&D tax credit reform in 2003[J] . Hiroyuki Kasahara,Katsumi Shimotsu,Michio Suzuki.Journal of The Japanese and International Economies . 2012
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Evaluating the impact of R&D tax credits on innovation: A microeconometric study on Canadian firms[J] . Dirk Czarnitzki,Petr Hanel,Julio Miguel Rosa.Research Policy . 2010 (2)