Research on the Impact of Environmental Regulation on Total Factor Energy Effect of Logistics Industry from the Perspective of Green Development

Table 10

Regional distribution of different threshold values according to the quality of labors.

Threshold interval	Province distribution at different time points
	2004	2012	2020
LnREG (LnHUC < 1.6799)	Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Anhui, Fujian, Jiangxi, Guangxi, Hainan, Henan, Sichuan, Chongqing, Guizhou, Yunnan, Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang	Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Jiangxi, Guangxi, Hainan, Gansu, and Qinghai	Inner Mongolia, Liaoning, Heilongjiang, Jiangxi, Guangxi, Gansu, and Qinghai
LnREG (1.6799 ≤ LnHUC ≤ 2.1163)	Beijing, Tianjin, Hebei, Jiangsu, Shanghai, Zhejiang, Shandong, Hubei, Hunan, and Guangdong	Tianjin, Jiangsu, Zhejiang, Anhui, Fujian, Shandong, Hubei, Hunan, Sichuan, Henan, Guangdong, Chongqing, Guizhou, Yunnan, Shaanxi, Ningxia, and Xinjiang	Tianjin, Shanxi, Jilin, Anhui, Fujian, Shandong, Hubei, Hunan, Hainan, Sichuan, Henan, Guizhou, Yunnan, Shaanxi, Ningxia, and Xinjiang
LnREG (LnHUC > 2.1163)		Beijing and Shanghai	Beijing, Hebei, Shanghai, Jiangsu, Zhejiang, Guangdong, and Chongqing