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6 城市环境立法影响企业出口DVAR的异质性分析（I）
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Tab. 6 Heterogeneity analysis of the impact of urban environmental legislation on enterprise DVAR (I)
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| 被解释变量 | dvar | | 创新能力 | | 融资约束 | | （1） | （2） | （3） | （4） | （5） | （6） | | post×treat | -0.0057*
(-1.93) | -0.0008
(-0.27) | | | -0.0074***
(-2.71) | -0.0024
(-0.72) | | | post×treat×un_inno | | | -0.0099***
(-6.32) | | | | | post×treat×l_fin | | | | | | -0.0071***
(-4.64) | | _cons | 0.8572***
(7.82) | 1.0636***
(34.74) | 0.9775***
(16.88) | 0.8893***
(9.42) | 1.0816***
(36.38) | 0.9765***
(16.83) | | Control | YES | YES | YES | YES | YES | YES | | ai | YES | YES | YES | YES | YES | YES | | at | YES | YES | YES | YES | YES | YES | | aj | YES | YES | YES | YES | YES | YES | | ap | YES | YES | YES | YES | YES | YES | | N | 90913 | 91010 | 181923 | 90781 | 91142 | 181923 | | adj. R2 | 0.087 | 0.073 | 0.089 | 0.068 | 0.097 | 0.089 |
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