乳制品进口对中国不同规模奶牛养殖效率的影响
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魏艳骄,朱晶
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Effects of dairy imports on the efficiency of cow farming operations of different scales in China
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Yanjiao WEI,Jing ZHU
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表4 乳制品进口对不同规模奶牛养殖效率影响的模型估计结果
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Table 4 Results of estimation for the effects of dairy imports on farming efficiency of farmers with different scales of operation
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变量名称 | Eist | | (1) | (2) | (3) | (4) | (5) | (6) | IM | -1.829*** (0.467) | -1.916*** (0.477) | -1.936*** (0.468) | -2.008 *** (0.472) | -2.012*** (0.468) | -1.817*** (0.463) | MP | | -1.491 (1.654) | 1.038 (1.689) | 0.672 (1.721) | 1.469 (1.719) | 1.619 (1.697) | DP | | | 1.378*** (0.259) | 1.369*** (0.260) | 1.290*** (0.258) | 1.315*** (0.255) | LP | | | | 2.167 (1.946) | 2.052 (1.929) | 0.881 (1.923) | FS | | | | | 0.119*** (0.032) | 0.123*** (0.032) | D | | | | | | -3.883 (2.597) | Cons | 80.570*** (1.115) | 87.087*** (7.315) | 68.933*** (7.943) | 62.938*** (9.595) | 50.901*** (10.055) | 50.871*** (9.927) | S×IM | | | | | | | θ1 | 1.971*** (0.470) | 2.065*** (0.481) | 2.098*** (0.471) | 2.165*** (0.475) | 2.153*** (0.471) | 1.961*** (0.466) | θ2 | 1.917*** (0.468) | 2.013*** (0.480) | 2.024*** (0.471) | 2.092*** (0.475) | 2.100*** (0.470) | 1.913*** (0.465) | θ3 | 1.841*** (0.468) | 1.937*** (0.480) | 1.951*** (0.471) | 2.018*** (0.475) | 2.016*** (0.470) | 1.830*** (0.465) | S×D | | | | | | | γ1 | | | | | | 7.218*** (1.683) | γ2 | | | | | | 2.484* (1.567) | γ3 | | | | | | 0.885 (1.489) | F | 7.46*** | 7.239*** | 8.48*** | 8.12*** | 8.52*** | 8.54*** | R2 | 0.664 | 0.667 | 0.669 | 0.669 | 0.669 | 0.661 | 观察值个数 | 685 | 685 | 685 | 685 | 685 | 685 |
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