| 来源类型 | Discussion paper |
| 规范类型 | 论文 |
| 来源ID | DP3604 |
| DP3604 Learning Temporal Preferences | |
| Eugenio Miravete; Ignacio Palacios-Huerta | |
| 发表日期 | 2002-10-20 |
| 出版年 | 2002 |
| 语种 | 英语 |
| 摘要 | We analyse the determinants of the decline in measured research productivity (the patent/R&D ratio) using panel data on manufacturing firms in the US for the period 1980-93. We focus on three factors: the level of demand, the quality of patents, and technological exhaustion. We first develop an index of patent ?quality? using detailed information on patents in the US in seven technology fields. Using a factor model, we construct a minimum-variance index based on four patent characteristics and show that using multiple indicators substantially reduces the measured variance in quality. We then show that research productivity at the firm level is negatively related to the patent quality index and the level of demand, as predicted by an optimizing model of R&D, and positively related to the stock market valuation of patented innovations held by firms. |
| 主题 | Industrial Organization |
| 关键词 | Patent quality R&d productivity Technological exhaustion Market value |
| URL | https://cepr.org/publications/dp3604 |
| 来源智库 | Centre for Economic Policy Research (United Kingdom) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/532611 |
| 推荐引用方式 GB/T 7714 | Eugenio Miravete,Ignacio Palacios-Huerta. DP3604 Learning Temporal Preferences. 2002. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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