地方政府的雾霾治理政策作用机制——政策工具、空间关联和门槛效应

李子豪, 袁丙兵

Environmental policy mechanism of local governments in the treatment of haze pollution：Policy tools, spatial correlations and threshold effects

LI Zihao, YUAN Bingbing

表6 城市层面门槛效应的稳健性检验

Table 6 Robustness test of threshold effect at the city level

科技支出区间 (0, 0.320] (0.320, 1.200] (1.200, +∞) 城镇化区间 (0, 71.880] (71.880, 79.900] (79.900, +∞) SMOGt-1 1.572*** 2.089*** 2.006*** SMOGt-1 0.802*** 0.742*** 0.713** (2.88) (3.48) (3.34) (2.79) (2.59) (2.48) INV 0.016 0.059** -0.312*** INV 0.031 0.153*** -0.467** (1.28) (2.39) (-2.92) (1.38) (4.51) (-2.33) EY 9.493* 14.381** 13.713** EY 2.543* 1.985 1.754 (1.81) (2.50) (2.38) (1.78) (1.61) (0.54) EY2 -0.156 -0.883** -0.837* EY2 -0.006 -0.031 -0.045 (-1.25) (-1.97) (-1.87) (-0.02) (-0.11) (-0.16) S 0.068 -0.099** -0.097** S -0.059 -0.088** -0.087** (1.50) (-2.08) (-2.02) (-0.31) (-2.27) (-2.25) FDI -0.298** -0.417*** -0.398*** FDI -0.119* -0.100 -0.095 (-2.31) (-2.95) (-2.81) (-1.68) (-1.42) (-1.34) DEN -0.122*** -0.161*** -0.155*** DEN -0.063*** -0.058** -0.056** (-2.90) (-3.50) (-3.36) (-2.80) (-2.60) (-2.50)