化肥投入效率测度及归因——来自20个玉米生产省份的面板证据
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张永强, 蒲晨曦, 王珧, 王荣, 彭有幸
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The efficiency estimation of fertilizer input and attribution—— panel evidence from 20 corn producing provinces
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Yongqiang ZHANG, Chenxi PU, Yao WANG, Rong WANG, Youxing PENG
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| 表2 估计结果 |
| Table 2 The results of estimation |
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| 普通OLS估计 | | 极大似然估计 | | 变量 | 系数值 | 标准误 | 系数值 | 标准误 | | lnFit | -0.650 | 1.657 | | -1.361 | 0.838 | | lnKit | -3.310*** | 0.794 | | 1.091 | 0.836 | | lnLit | 1.276*** | 0.539 | | -0.424 | 0.564 | | lnT | 0.015 | 0.064 | | 0.043 | 0.042 | | [lnFit]2 | -0.285 | 0.390 | | -0.113 | 0.276 | | [lnKit]2 | 0.508*** | 0.120 | | 0.038 | 0.108 | | [lnLit]2 | -0.156*** | 0.057 | | -0.021 | 0.061 | | [lnT]2 | -0.002*** | 0.001 | | -0.001*** | 0.001 | | lnFit×lnKit | 0.121 | 0.351 | | -0.108 | 0.270 | | lnFit×lnLit | 0.401*** | 0.177 | | 0.507*** | 0.182 | | lnLit×lnKit | -0.264*** | 0.087 | | -0.186*** | 0.099 | | T×lnFit | -0.012 | 0.023 | | -0.006 | 0.016 | | T×lnKit | -0.014 | 0.012 | | 0.003 | 0.010 | | T×lnLit | 0.025*** | 0.009 | | -0.002 | 0.007 | | 常数值 | 10.857*** | 2.387 | | 6.345** | 1.311 | | σ2 | 0.015 | | | 0.026 365 5*** | 0.004 | | γ | | | 0.776 188 0*** | 14.428 | | 似然函数值 | 0.015 | | 253.177 | | 似然比检验单侧值 | | | 141.342 |
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