中文摘要：

文章利用长三角25个城市2007—2014年的面板数据，以人力资本、经济发展水平、对外开放度、金融发展水平和技术研发强度等吸收能力变量分别作为转换变量，采用包含外生变量的面板平滑转换（PSTR）模型检验了基于OFDI、FDI和进口三种渠道的国际R＆D对区域技术创新的非线性动态溢出效应。结果显示：当所有的吸收能力变量跨越各自的门槛值使PSTR模型趋于高体制时，基于OFDI的国际R＆D对区域技术创新均产生显著的正向溢出。对应于不同的吸收能力变量，当PSTR模型趋于高体制时，基于FDI和进口的国际R＆D对区域技术创新的溢出效应更明显。随着吸收能力变量水平的连续增加，基于三种渠道的国际R＆D对区域技术创新的溢出效应均在持续增强，国际R＆D和区域技术创新之间存在平滑转换机制效应。

英文摘要：

Based on the 25 cities＇ data in Yangtze River Delta from 2007 to 2014, and by using absorptive capacity variables such as human capital, economic development level, openness, financial development level and this paper analyzes the non-linear and R＆D intensity as a transition variable respectively, dynamic spillover effects of international R＆D through OFDI, FDI and import channels on regional technology innovation with panel smooth transition regression model including exogenous variables. The results show that international R＆D through OFDI channel has a positive spillover effect on regional technology innovation when all the absorptive capacity variables exceed their thresholds and PSTR models tend to high regime. International R＆D through FDI and import channels has more significant spillover effects on regional technology innovation when PSTR models tend to high regime. The spillover effect of international R＆D through different channels on regional technology innovation continues to increase with the continuous improvement of absorptive capacity variables. There is a non- linear and smooth transition feature between international R＆D and regional technology innovation.