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我的实证结果如下,哪位大神能帮忙指点一下?这个具体说明了什么
Fixed-effects (within) regression Number of obs = 300
Group variable: province Number of groups = 30
R-sq: within = 0.0044 Obs per group: min = 10
between = 0.0000 avg = 10.0
overall = 0.0006 max = 10
F(4,266) = 0.29
corr(u_i, Xb) = -0.3347 Prob > F = 0.8834
------------------------------------------------------------------------------
index | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
trade | -.0021937 .0039306 -0.56 0.577 -.0099328 .0055453
aexport | -.010847 .0392625 -0.28 0.783 -.0881519 .0664578
aimprot | .021996 .0268487 0.82 0.413 -.0308669 .074859
agdpigdp | .0672708 .1365536 0.49 0.623 -.2015925 .3361342
_cons | .9293246 .2075458 4.48 0.000 .520683 1.337966
-------------+----------------------------------------------------------------
sigma_u | .21195541
sigma_e | .58996033
rho | .11431954 (fraction of variance due to u_i)
------------------------------------------------------------------------------
F test that all u_i=0: F(29, 266) = 1.13 Prob > F = 0.2958
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