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
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张兵兵, 胡榴榴
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Can urban environmental legislation improve the enterprises export domestic value added ratio? Empirical research based on difference-in-differences (DID) model
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ZHANG Bingbing, HU Liuliu
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表9 城市环境立法影响企业出口DVAR的传导机制检验（II）
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Tab. 9 Examination of the transmission mechanism of urban environmental legislation affecting enterprise DVAR (II)
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| （1） | （2） | （3） | （4） | （5） | （6） | （7） | （8） | | inter_v | inter_q | dvar | inter_v | inter_q | dvar | dvar | dvar | | post×treat | -0.0971***
(-12.16) | -0.4469***
(-23.30) | -0.0037*
(-1.82) | | | | -0.0041**
(-1.98) | | | post×treat×poll | | | | -0.1027***
(-8.50) | -0.3782***
(-15.25) | -0.0063**
(-2.23) | | -0.0069**
(-2.41) | | inter_v | | | 0.0063***
(6.08) | | | 0.0063***
(6.08) | 0.0062***
(5.95) | 0.0062***
(5.94) | | inter_q | | | 0.0032***
(9.14) | | | 0.0032***
(9.16) | 0.0032***
(9.23) | 0.0033***
(9.25) | | markup | | | | | | | 0.0103***
(6.07) | 0.0103***
(6.07) | | _cons | 1.7847***
(5.63) | 12.8965***
(18.74) | 0.9057***
(15.58) | 1.7151***
(5.41) | 12.5738***
(18.21) | 0.9025***
(15.56) | 0.8821***
(15.12) | 0.8786***
(15.10) | | Control | YES | YES | YES | YES | YES | YES | YES | YES | | ai | YES | YES | YES | YES | YES | YES | YES | YES | | at | YES | YES | YES | YES | YES | YES | YES | YES | | aj | YES | YES | YES | YES | YES | YES | YES | YES | | ap | YES | YES | YES | YES | YES | YES | YES | YES | | N | 181923 | 181923 | 181923 | 181923 | 181923 | 181923 | 181923 | 181923 | | adj. R2 | 0.290 | 0.231 | 0.091 | 0.289 | 0.229 | 0.091 | 0.094 | 0.094 |
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