Different types of industrial agglomeration and green total factor productivity in China: do institutional and policy characteristics of cities make a difference?

Environmental Sciences Europe

Table 7 Heterogeneity analysis based on the administrative levels of the city

Variables	(1)	(2)	(3)	(4)	(5)	(6)
Variables	High	High	High	Low	Low	Low
lnLQ_MAN	0.100			0.047*
	(1.66)			(1.94)
lnLQ_PS8		0.049			0.076
		(0.70)			(1.03)
lnCOAG			0.326**			0.154*
			(2.14)			(1.88)
lnPopDensity	− 0.006	− 0.007	− 0.005	− 0.010	− 0.009	− 0.009
	(− 0.96)	(− 1.10)	(− 0.90)	(− 0.89)	(− 0.80)	(− 0.85)
lnTaddSadd	0.092	0.063	0.075	− 0.067***	− 0.078***	− 0.070***
	(1.61)	(1.02)	(1.32)	(− 2.79)	(− 3.74)	(− 3.00)
lnRegulation	0.786***	0.787***	0.800***	0.696***	0.717***	0.708***
	(2.96)	(2.88)	(2.97)	(5.60)	(5.65)	(5.68)
lnSciEdu	− 0.060	− 0.051	− 0.053	− 0.043**	− 0.044**	− 0.042**
	(− 1.55)	(− 1.35)	(− 1.48)	(− 2.16)	(− 2.17)	(− 2.13)
lnuF	− 0.009	− 0.008	− 0.009	− 0.004	− 0.004	− 0.004
	(− 0.88)	(− 0.78)	(− 0.87)	(− 0.90)	(− 0.98)	(− 0.91)
Constant	1.171***	1.200***	0.852**	1.103***	1.113***	0.961***
	(3.17)	(3.23)	(2.08)	(5.55)	(5.57)	(4.54)
Observations	490	490	490	3,444	3,444	3,444
R-squared	0.569	0.566	0.572	0.391	0.391	0.392
Number of cities	35	35	35	246	246	246