Has Manufacturing Agglomeration Facilitated City Innovation？：An Empirical Analysis from the Perspective of U-shaped Relationship
CHENG Jiexian，LUO Liting
JOURNAL OF JIANGHAN UNIVERSITY (Social Science Edition) . 2023, (5): 66 -77 .  DOI: 10.16387/j.cnki.42-1867/c.2023.05.007