Abstract: This paper tries to verify the existence of the Syphonage Effect upon the collaborative innovation in the BeijingTianjinHebei metropolitan region (BJTJHE). Taking hightech enterprises that had been publicly listed between 2009 and 2015 in BJTJHE and the Pearl River Delta (PRD) as a sample, this paper aims to analyze the difference of R&D intensity among BJTJHE enterprises. As research shown, BJTJHE enterprises have much higher R&D intensity compared to those from PRD. Meanwhile, since a converging trend has been shown among multiple enterprises in terms of R&D intensity, the “Syphonage Effect” is nonexistent. This phenomenon is distinct from the polarization on R&D intensity between Shenzhen and Guangzhou enterprises in PRD.

Key words:  BeijingTianjinHebei region , collaborative innovation , Syphonage , finances and taxation policies

摘要： 本文以2009—2015年京津冀和珠三角上市高新企业为样本，实证分析京津冀协同创新是否存在“虹吸效应”。研究结果表明，京津冀地区企业研发投入积极性要远大于珠三角地区，且通过与珠三角地区的样本数据相比较，京津冀地区内企业研发积极性趋同，即不存在“虹吸效应”，而珠三角地区则出现深圳与广州企业研发积极性的两极分化现象。

关键词: 京津冀 , 协同创新 , 虹吸效应 , 财税政策