全球科研合作网络的动态演化及其驱动机制
|
|
桂钦昌, 杜德斌, 刘承良
|
The network dynamics and driving mechanisms of global scientific cooperation
|
|
GUI Qinchang, DU Debin, LIU Chengliang
|
|
表4 全球科研合作的驱动因素时间演化
|
Tab. 4 Temporal evolution of the driving factors of the global scientific collaboration network
|
|
| 时段 | | 2003—2005 | 2006—2008 | 2009—2011 | 2012—2014 | 2015—2017 | 2017—2019 | | 地理邻近性 | 0.506*** | 0.503*** | 0.432*** | 0.306*** | 0.284*** | 0.254*** | | (0.024) | (0.030) | (0.021) | (0.019) | (0.020) | (0.018) | | 认知邻近性 | 0.149*** | 0.187*** | 0.208*** | 0.208*** | 0.231*** | 0.263*** | | (0.022) | (0.028) | (0.025) | (0.024) | (0.026) | (0.022) | | 社会邻近性 | 0.187*** | 0.145*** | 0.318*** | 0.511*** | 0.524*** | 0.626*** | | (0.028) | (0.030) | (0.032) | (0.031) | (0.031) | (0.036) | | 共同语言 | 0.083*** | 0.051*** | 0.033** | 0.005 | 0.000 | 0.012 | | (0.019) | (0.015) | (0.013) | (0.012) | (0.010) | (0.009) | | 历史联系 | 0.074*** | 0.066*** | 0.059*** | 0.075*** | 0.050*** | 0.035** | | (0.019) | (0.020) | (0.018) | (0.018) | (0.017) | (0.0145) | | 人才流动 | 0.323*** | 0.386*** | 0.302*** | 0.282*** | 0.253*** | 0.313*** | | (0.032) | (0.030) | (0.027) | (0.024) | (0.026) | (0.025) | | 国家/地区i控制变量 | YES | YES | YES | YES | YES | YES | | 国家/地区j控制变量 | YES | YES | YES | YES | YES | YES | | 常数项 | 4.271*** | 4.335*** | 4.455*** | 4.641*** | 4.783*** | 4.411*** | | (0.025) | (0.024) | (0.021) | (0.019) | (0.028) | (0.042) | | 观察值 | 2628 | 2628 | 2628 | 2628 | 2628 | 2628 | | Alpha | 0.600 | 0.625 | 0.606 | 0.557 | 0.512 | 0.434 | | Wald chi2 | 13708.97 | 11456.21 | 14108.83 | 17239.37 | 8529.62 | 10407.21 | | Prob > chi2 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | | Log pseudolikelihood | -10921.268 | -12127.680 | -13715.301 | -15384.121 | -16958.363 | -17609.594 |
|
|
|