Differential Analysis of Impact of Imported Producer Services #br# on Manufacturing Value Chain Upgrading#br# —Dual Perspectives Based on Import Quality and Quantity#br#
SHAN Yuan-yuan, XU Ge-yi
Journal of Beijing University of Posts and Telecommunications(Social Sciences Edition) . 2021, (2): 45 -55 .  DOI: 10.19722/j.cnki.1008-7729.2020.0287