变量

模型(1)

模型(2)

模型(3)

模型(4)

模型(5)

ols_vce

FE_ordinary

FE_trend

FE_robust

RE_ordinary

LNK_it

0.3706***

0.1156***

0.1313***

0.1156***

0.1259***

(0.0612)

(0.0175)

(0.0165)

(0.0368)

(0.0235)

LNL_it

0.5475***

0.0011

0.0357

0.0011

0.4411***

(0.0378)

(0.0364)

(0.0343)

(0.0456)

(0.0345)

LNEdu_it

0.1785

0.2474***

0.2629***

0.2474***

0.2270***

(0.1120))

(0.0359)

(0.0335)

(0.0389)

(0.0504)

LNTec_it

0.1705***

0.0694***

0.0700***

0.0694***

0.0900***

(0.0416)

(0.0174)

(0.0162)

(0.0253)

(0.0221)

LNSoc_it

0.1307***

0.0764***

−0.0056

0.0764***

0.1156***

(0.0431)

(0.0239)

(0.0255)

(0.0243)

(0.0324)

LNMed_it

−0.1642

0.1307***

−0.0206

0.1307***

0.0269

(0.1231)

(0.0330)

(0.0384)

(0.0371)

(0.0403)

LNAgr_it

−0.0988

0.009

−0.0841

0.009

−0.0019

(0.0721)

(0.0296)

(0.0310)

(0.0385)

(0.0403)

LNTra_it

−0.0511

0.0428***

0.0609***

0.0428***

−0.0173

(0.0380)

(0.0138)

(0.0132)

(0.0146)

(0.0189)

year_it

0.0332***

(0.0051)

C

5.4753***

10.8337***

16.6737***

10.8337***

7.1100***

(0.4683)

(0.3977)

(0.9660)

(0.5122)

(0.4454)

R-squared

0.9822

0.9567

0.9627

0.9567

0.9314

F

1045.87

749.00

773.32

238.27

Prob

0.0000

0.0000

0.0000

0.0000

0.0000

N

310

310

310

310

310