土地细碎化、耕地地力对粮食生产效率的影响——基于江汉平原354个水稻种植户的研究
王嫚嫚, 刘颖, 蒯昊, 周晓时

The effects of land fragmentation and land quality on the technical efficiency of grain production based on 354 rice planters on the Jianghan Plain
Manman WANG, Ying LIU, Hao KUAI, Xiaoshi ZHOU
表3 模型极大似然估计结果
Table 3 The maximum likelihood estimation results of the model
变量 模型1 模型2 模型3 模型4
production function
x1 -0.017 7* -0.017 8* -0.019 2** -0.019 8**
(-1.86) (-1.89) (-2.00) (-2.19)
x2 0.051 0* 0.059 8** 0.058 8* 0.068 4**
(1.75) (2.04) (1.86) (2.33)
x3 -0.031 1*** -0.031 4*** -0.031 2*** -0.031 6***
(-3.20) (-3.27) (-3.23) (-3.30)
x4 -0.020 8 -0.021 4 -0.022 6 -0.022 5
(-1.05) (-1.13) (-1.17) (-1.18)
x5 -0.055 6** -0.058 0** -0.054 1** -0.055 3**
(-2.43) (-2.58) (-2.38) (-2.44)
x6 0.058 0* 0.056 9** 0.053 7* 0.053 0*
(1.86) (2.09) (1.85) (1.95)
SI - -0.034 0 - -0.035 9
- (-1.54) - (-1.62)
LQ - - -0.019 2** -0.019 1**
- - (-2.13) (-2.16)
_cons 10.097 3*** 10.061 1*** 10.109 6*** 10.060 0***
(27.83) (28.09) (28.20) (27.91)
technical inefficiency
z1 0.001 9* 0.002 0** 0.001 8* 0.001 8*
(1.90) (2.48) (1.83) (1.76)
z2 0.007 0 0.010 1 0.005 1 0.008 3
(0.61) (0.98) (0.44) (0.72)
LQ 0.024 1* 0.022 5* - -
(1.70) (1.95) - -
SI 0.038 1 - 0.038 1 -
(0.70) - (0.93) -
z3 0.129 2*** 0.135 6*** 0.142 8*** 0.152 2***
(3.81) (4.29) (3.72) (4.54)
z4 -0.019 9*** -0.019 1*** -0.020 2*** -0.019 9***
(-5.46) (-10.24) (-8.84) (-9.95)
_cons1 0.597 0*** 0.551 6*** 0.653 2*** 0.628 6***
(3.69) (5.70) (4.89) (5.34)
model diagnostics
σ2 0.070 3*** 0.070 1** 0.082 3 0.082 4*
(-3.35) (-2.85) (-1.40) (-1.66)
γ 0.853 0** 0.850 5* 0.874 3 0.872 8
(1.98) (1.67) (1.00) (1.17)
H0:No inefficiency component(Probz): 0.002 0.004 0.002 0.004