乳制品进口对中国不同规模奶牛养殖效率的影响
魏艳骄,朱晶

Effects of dairy imports on the efficiency of cow farming operations of different scales in China
Yanjiao WEI,Jing ZHU
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
Table 4 Results of estimation for the effects of dairy imports on farming efficiency of farmers with different scales of operation
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