Mengzhen Zhao

Sep 25, 2023 | mdpi.com | Weifeng Gong |Mengzhen Zhao |Chuanhui Wang |Asong Han

4. Empirical Analysis 4.1. Existence Test for Threshold of Industry Agglomeration LevelBefore conducting empirical analysis using the threshold model in this study, it was necessary to examine whether thresholds exist, as well as the existence of threshold effects and the number of thresholds. The relevant code used the threshold model developed by Wang (2015) to test the threshold effect on the impact of industrial agglomeration on eco-efficiency [].