Empirical Analysis on Evolution and Small World Effect of Chinese Enterprise-Enterprise Patent Cooperation Network: From the Perspective of Open Innovation
Abstract
:1. Introduction
2. Data Collection and Research Method
2.1. Data Collection and Disposal
2.2. Social Network Analysis
3. Results and Discussion
3.1. The Evolution of Network Structure
Stage | 1985—1989 | 1990—1994 | 1995—1999 | 2000—2004 | 2005—2007 | 2008—2010 |
odes | 79 | 168 | 215 | 735 | 1679 | 5736 |
Largest connected component ratio (%) | 20.253 | 27.381 | 20.000 | 98.912 | 7.028 | 15.394 |
Average Degree | 2.177 | 2.155 | 1.758 | 3.540 | 1.762 | 2.0321 |
NRM Average Degree | 2.791 | 1.290 | 0.822 | 0.482 | 0.1050 | 0.0354 |
Central Potential | 0.1687 | 0.2597 | 0.1474 | 0.1099 | 0.0240 | 0.0110 |
Intensity | 0.0279 | 0.0129 | 0.0082 | 0.0048 | 0.0011 | 0.0004 |
3.2. The Evolution of Major Cooperative Groups
3.3. Analysis of Small-World Effect
1985–1989 | 1990–1994 | 1995–1999 | 2000–2004 | 2005–2007 | 2008–2010 | ||
Actual Networks | Clustering coefficient | 0.1053 | 0.0432 | 0.1792 | 0.0248 | 0.1428 | 0.2888 |
Average path length | 1.8500 | 1.9440 | 2.2570 | 8.8735 | 3.8847 | 7.3578 | |
Random Networks | Clustering coefficient | 0.0732 | 0.0465 | 0.1005 | 0.0068 | 0.0332 | 0.0046 |
Average path length | 2.6857 | 3.8003 | 3.2171 | 5.1817 | 3.8126 | 5.3184 |
4. Conclusions and Suggestions
Acknowledgment
Conflicts of Interest
References and Notes
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Ye, C.; Yu, X.; Li, W. Empirical Analysis on Evolution and Small World Effect of Chinese Enterprise-Enterprise Patent Cooperation Network: From the Perspective of Open Innovation. Information 2013, 4, 398-410. https://doi.org/10.3390/info4040398
Ye C, Yu X, Li W. Empirical Analysis on Evolution and Small World Effect of Chinese Enterprise-Enterprise Patent Cooperation Network: From the Perspective of Open Innovation. Information. 2013; 4(4):398-410. https://doi.org/10.3390/info4040398
Chicago/Turabian StyleYe, Chunxia, Xiang Yu, and Wei Li. 2013. "Empirical Analysis on Evolution and Small World Effect of Chinese Enterprise-Enterprise Patent Cooperation Network: From the Perspective of Open Innovation" Information 4, no. 4: 398-410. https://doi.org/10.3390/info4040398