中国科学院数学与系统科学研究院期刊网
A Study on Transport Costs and China’s Exports: An Extended Gravity Model
XU Lizhi,LAI Kin Keung,QIAO Han,WANG Shouyang
A Study on Transport Costs and China’s Exports: An Extended Gravity Model
XU Lizhi,LAI Kin Keung,QIAO Han,WANG Shouyang
Journal of Systems Science and Complexity . 2017, (6): 1403 -1424 .  DOI: 10.1007/s11424-017-5191-z