The Impact of Green R&D Activities on SO₂ Emissions: Evidence from China

Table 2

Descriptive analysis correlation coefficient matrix.

	ln PSO	ln GRD	ln CGRD	ln UGRD	ln PGDP	ln PGDP^2	ln IND	ln ENSTR	ln UR
ln PSO	1
ln GRD	−0.261	1
ln CGRD	−0.271	0.987	1
ln UGRD	−0.249	0.979	0.943	1
ln PGDP	−0.197	0.822	0.824	0.8	1
ln PGDP^2	−0.222	0.636	0.635	0.622	0.764	1
ln IND	0.472	0.201	0.164	0.252	0.17	−0.0024	1
ln ENSTR	0.511	−0.101	−0.14	−0.0599	−0.24	−0.255	0.524	1
ln UR	−0.139	0.648	0.667	0.602	0.876	0.646	0.0731	−0.342	1