变量

粮食主产区

产销平衡区

粮食主销区

回归系数

效应分解

回归系数

效应分解

回归系数

效应分解

直接效应

间接效应

总效应

直接效应

间接效应

总效应

直接效应

间接效应

总效应

exclim

−0.0528^***

(0.0189)

−0.0643^***

(0.0204)

−0.1470^***

(0.0512)

−0.2113^***

(0.0600)

−0.0135^**

(0.0066)

−0.0116

(0.0074)

−0.0084

(0.0113)

−0.0201^*

(0.0105)

0.0024

(0.0040)

0.0042

(0.0046)

0.0116^*

(0.0069)

0.0158

(0.0100)

city

−0.0024^***

(0.0007)

−0.0028^***

(0.0009)

−0.0037

(0.0026)

−0.0065^**

(0.0032)

−0.0006^*

(0.0003)

−0.0003

(0.0003)

−0.0020^***

(0.0005)

−0.0023^***

(0.0005)

−0.0014^***

(0.0005)

−0.0010^*

(0.0006)

0.0028^***

(0.0007)

0.0018

(0.0012)

lngdp

0.0652^***

(0.0193)

0.0829^***

(0.0254)

0.1857^**

(0.0800)

0.2687^***

(0.1017)

0.0402^***

(0.0076)

0.0423^***

(0.0085)

−0.0056

(0.0143)

0.0367^***

(0.0124)

0.0038

(0.0252)

0.0049

(0.0281)

−0.0119

(0.0294)

−0.0070

(0.0556)

invest

2.0943^***

(0.2614)

2.5348^***

(0.3518)

5.1603^***

(1.5359)

7.6951^***

(1.7643)

−0.0614

(0.0523)

−0.0397

(0.0583)

−0.1353^*

(0.0746)

−0.1750^***

(0.0570)

−1.6303^***

(0.4648)

−1.1218^*

(0.6819)

3.0667^***

(0.9430)

1.9449

(1.6117)

edu

−0.0078

(0.0104)

−0.0153

(0.0121)

−0.0919^**

(0.0389)

−0.1072^**

(0.0475)

−0.0077^***

(0.0021)

−0.0136^***

(0.0025)

0.0321^***

(0.0054)

0.0185^***

(0.0050)

0.0101^**

(0.0046)

0.0112^**

(0.0047)

0.0103

(0.0063)

0.0215^**

(0.0095)

Log-l

302.6272

355.1283

238.0984

R²

0.6160

0.4254

0.8255