期刊
RESEARCH POLICY
卷 37, 期 10, 页码 1829-1836出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.respol.2008.08.004
关键词
R&D efficiency change; Data envelopment analysis; Malmquist index; Japanese pharmaceutical industry
类别
This paper presents a data envelopment analysis (DEA)/Malmquist index methodology for measuring the change in R&D efficiency at both firm and industry levels. Letting each of ten firms in each year be a separate decision-making unit, and employing one input and three outputs in a DEA case of R&D activity input-output lag, we measure total factor R&D efficiency change of Japanese pharmaceutical firms for decade 1983-1992 as defined by the period of R&D input. Decomposing Malmquist index into catch-up and frontier shift components and using cumulative indices proposed in this study, we evaluate R&D efficiency change for each firm and empirically show that R&D efficiency of Japanese pharmaceutical industry has almost monotonically gotten worse throughout the study decade. (C) 2008 Elsevier B.V. All rights reserved.
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