Wang Y, Liu S. Spatial Spillover Effects of Co-Agglomeration of Producer Services on the Upgrading of Global Value Chain: Evidence from China’s Spatial Panel Data. FSD [Internet]. 2022 Aug. 30 [cited 2026 Aug. 20];2(8):1-7. Available from: https://bcpublication.org/index.php/FSD/article/view/1908