城市环境立法能够提升企业出口国内附加值率吗?——基于双重差分模型(DID)的实证研究
张兵兵, 胡榴榴

Can urban environmental legislation improve the enterprises export domestic value added ratio? Empirical research based on difference-in-differences (DID) model
ZHANG Bingbing, HU Liuliu
表3 城市环境立法影响企业出口DVAR的稳健性检验(I)
Tab. 3 Robustness test of the impact of urban environmental legislation on enterprise DVAR (I)
被解释变量 dvar
倾向得分匹配 调整样本区间
(1) (2) (3) (4)
post×treat -0.0086***
(-4.03)
-0.0072***
(-3.43)
-0.0059***
(-2.76)
-0.0036*
(-1.73)
_cons 0.9059***
(14.71)
0.9771***
(16.28)
0.8552***
(17.04)
0.9181***
(17.81)
Control NO YES NO YES
ai YES YES YES YES
at YES YES YES YES
aj YES YES YES YES
ap YES YES YES YES
N 123413 123413 149263 149263
adj. R2 0.069 0.089 0.038 0.072