Fixed-effects (within) regression Number of obs = 270
Group variable: district Number of groups = 30
R-sq: within = 0.3651 Obs per group: min = 9
between = 0.6362 avg = 9.0
overall = 0.5300 max = 9
F(8,232) = 16.68
corr(u_i, Xb) = -0.0605 Prob > F = 0.0000
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lnpatent | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
lncharge | .0988603 .1861722 0.53 0.596 -.267944 .4656646
lnascale | .3145636 .2756249 1.14 0.255 -.2284841 .8576113
sqrtnumber | -.3619871 .164627 -2.20 0.029 -.6863422 -.037632
lnedu | .2255817 .2556376 0.88 0.378 -.2780863 .7292497
lncapital | .6798093 .3027874 2.25 0.026 .0832448 1.276374
lnmarket | -.6597094 .3848387 -1.71 0.088 -1.417935 .098516
lnletter | .0022386 .0600167 0.04 0.970 -.1160088 .120486
lnenergyc | -.3095587 .6136068 -0.50 0.614 -1.518512 .8993951
_cons | -6.011771 3.608769 -1.67 0.097 -13.12192 1.098377
-------------+----------------------------------------------------------------
sigma_u | .80969135
sigma_e | .90665845
rho | .44368364 (fraction of variance due to u_i)
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F test that all u_i=0: F(29, 232) = 4.64 Prob > F = 0.0000
这个运行结果说明什么问题啊?P值显示好多都不显著,这个怎么办啊?