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 9 Heterogeneity analysis based on different stages of development

Variables	(1)	(2)	(3)	(4)	(5)	(6)
Variables	2004–2011	2004–2011	2004–2011	2012–2017	2012–2017	2012–2017
lnLQ_MAN	0.149			0.017
	(1.56)			(0.56)
lnLQ_PS8		0.205			0.082
		(0.85)			(1.47)
lnCOAG			0.293			0.150*
			(1.25)			(1.71)
lnPopDensity	− 0.009	− 0.005	− 0.007	0.004	0.004	0.003
	(− 0.80)	(− 0.55)	(− 0.70)	(0.31)	(0.31)	(0.27)
lnTaddSadd	− 0.062	− 0.061	− 0.060	− 0.107***	− 0.115***	− 0.110***
	(− 1.01)	(− 1.07)	(− 0.98)	(− 2.98)	(− 3.17)	(− 3.08)
lnRegulation	0.576**	0.549**	0.557**	0.845***	0.849***	0.849***
	(2.37)	(2.16)	(2.23)	(5.11)	(5.09)	(5.19)
lnSciEdu	− 0.063**	− 0.069**	− 0.063**	− 0.054*	− 0.055**	− 0.054*
	(− 2.37)	(− 2.37)	(− 2.33)	(− 1.94)	(− 1.97)	(− 1.90)
lnuF	− 0.005	− 0.009	− 0.007	− 0.004	− 0.003	− 0.003
	(− 0.80)	(− 1.62)	(− 1.21)	(− 0.40)	(− 0.35)	(− 0.35)
Constant	0.908**	0.816**	0.560	1.386***	1.386***	1.252***
	(2.44)	(2.06)	(1.13)	(5.37)	(5.36)	(4.66)
Observations	1,967	1,967	1,967	1,686	1,686	1,686
R-squared	0.271	0.270	0.270	0.461	0.462	0.462
Number of cities	281	281	281	281	281	281