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2 城市环境立法影响企业出口DVAR的基准回归结果
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Tab. 2 Urban environmental legislation affects the baseline regression results of enterprise DVAR
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| 被解释变量 | dvar | | （1） | （2） | （3） | （4） | （5） | | post×treat | -0.0074***
(-3.52) | -0.0074***
(-3.54) | -0.0061***
(-2.95) | -0.0058***
(-2.84) | -0.0059***
(-2.85) | | age | | 0.0080***
(5.09) | 0.0082***
(5.30) | 0.0082***
(5.31) | 0.0095***
(6.14) | | exprint | | | -0.0929***
(-34.34) | -0.0934***
(-34.54) | -0.0933***
(-34.54) | | caplab | | | | -0.0045***
(-7.27) | -0.0065***
(-9.16) | | scale | | | | | -0.0063***
(-5.63) | | _cons | 0.8848***
(15.71) | 0.8698***
(15.53) | 0.8696***
(15.47) | 0.9183***
(16.14) | 0.9795***
(16.89) | | ai | YES | YES | YES | YES | YES | | at | YES | YES | YES | YES | YES | | aj | YES | YES | YES | YES | YES | | ap | YES | YES | YES | YES | YES | | N | 181923 | 181923 | 181923 | 181923 | 181923 | | adj. R2 | 0.067 | 0.068 | 0.088 | 0.088 | 0.089 |
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