沿海城市经济增长目标约束对近海污染的影响
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沈伟腾, 胡求光, 余璇
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Impact of coastal city economic growth target on offshore pollution
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SHEN Weiteng, HU Qiuguang, YU Xuan
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表2 基准回归结果
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Table 2 Benchmark regression results
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| 变量 | 被解释变量：无机氮浓度 | | (1) | (2) | (3) | | Tough | 0.020** | | 0.019** | | (0.008) | | (0.008) | | RTough | -0.001 | | -0.002 | | (0.009) | | (0.009) | | Upon | | 0.007*** | 0.007*** | | | (0.002) | (0.002) | | lnPergdp | -0.720*** | -0.780*** | -0.777*** | | (0.192) | (0.199) | (0.193) | | lnPergdp2 | 0.031*** | 0.034*** | 0.034*** | | (0.008) | (0.009) | (0.008) | | lnDensity | 0.038*** | 0.038** | 0.037*** | | (0.012) | (0.013) | (0.012) | | lnPatgranted | 0.048 | 0.051 | 0.052* | | (0.030) | (0.030) | (0.030) | | Urbanization | -0.000 | -0.000 | -0.000 | | (0.001) | (0.001) | (0.001) | | Secondgdp | -0.001 | -0.001 | -0.001 | | (0.001) | (0.001) | (0.001) | | lnMgdp | 0.008 | 0.006 | 0.005 | | (0.022) | (0.022) | (0.022) | | 截距项 | 3.498*** | 3.805*** | 3.801*** | | (0.880) | (0.926) | (0.904) | | 城市固定效应 | 是 | 是 | 是 | | 年份固定效应 | 是 | 是 | 是 | | N | 646 | 646 | 646 | | 组内R2 | 0.357 | 0.361 | 0.362 | | Pesaran统计值 | 3.986*** | 4.002*** | 3.883*** |
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