. xtreg zscore cr10 lnsize lev fage,fe
note: fage omitted because of collinearity
Fixed-effects (within) regression Number of obs = 2,334
Group variable: company Number of groups = 502
R-sq: Obs per group:
within = 0.2253 min = 1
between = 0.2645 avg = 4.6
overall = 0.2783 max = 8
F(3,1829) = 177.32
corr(u_i, Xb) = 0.1082 Prob > F = 0.0000
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zscore | Coef. Std. Err. t P>|t| [95% Conf. Interval]
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cr10 | .6763231 .0890368 7.60 0.000 .5016985 .8509477
lnsize | -.0543092 .0154826 -3.51 0.000 -.0846746 -.0239437
lev | -.8822911 .0723744 -12.19 0.000 -1.024236 -.7403461
fage | 0 (omitted)
_cons | .9433163 .3460275 2.73 0.006 .2646657 1.621967
-------------+----------------------------------------------------------------
sigma_u | .374351
sigma_e | .27027158
rho | .65735586 (fraction of variance due to u_i)
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F test that all u_i=0: F(501, 1829) = 4.26 Prob > F = 0.0000