Abstract: Patent citation is an important approach for the technology spillover study, and is the measuring foundation for technical knowledge flow analysis.

摘要专利间的引用关系是研究技术溢出的重要途径之一，为分析技术知识的流动提供了客观的测度依据。

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Some follow the traditional approach of looking at stock charts and moving averages to identify the trend of different players (technical analysis).

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