| 来源类型 | Working Paper
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| 规范类型 | 报告
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| DOI | 10.3386/w5478
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| 来源ID | Working Paper 5478
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| Measuring Science: An Exploration |
| James Adams; Zvi Griliches
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| 发表日期 | 1996-03-01
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| 出版年 | 1996
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| 语种 | 英语
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| 摘要 | This paper examines available U.S. data on academic R&D expenditures and the number of papers published and the number of citations to these papers as possible measures of `output' of this enterprise. We look at these numbers for science and engineering as a whole, for 5 selected major fields, and at the individual university-field level. The published data in Science and Engineering Indicators imply sharply diminishing returns to academic R&D using published papers as a 'output' measure. These data are problematic. Using a newer set of data on papers and citations, based on an `expanding' set changes the picture drastically, eliminating seemingly diminishing returns but raising the question of why input prices of academic R&D are rising so much faster than either the GDP deflator or the implicit R&D deflator in industry. A production function analysis of such data indicates significant diminishing returns to `own' R&D, with the R&D coefficients hovering around 0.5 for estimates with paper numbers as the dependent variable and around 0.6 if total citations are used. When we substitute scientists and engineers in place of R&D as the right hand side variables, the coefficient on papers rises from 0.5 to 0.8, and the coefficient on citations rises from 0.6 to 0.9, indicating systematic measurement problems with R&D as the sole input into the production of scientific output. But allowing for individual university-field effects drives these numbers down below unity. Since in the aggregate both paper numbers and citations are growing as fast or faster than R&D, this can be seen as leaving a major, yet unmeasured role, for the contribution of spill- overs from other fields, other universities, and other countries. |
| 主题 | Development and Growth
; Growth and Productivity
; Public Economics
; Public Goods
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| URL | https://www.nber.org/papers/w5478
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| 来源智库 | National Bureau of Economic Research (United States)
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| 引用统计 |
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/562941
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推荐引用方式
GB/T 7714 |
James Adams,Zvi Griliches. Measuring Science: An Exploration. 1996.
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文件名：
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w5478.pdf
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格式：
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Adobe PDF
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