Code:
. xtset company year
panel variable: company (unbalanced)
time variable: year, 2014 to 2018, but with gaps
delta: 1 year
. xtreg y x1 x2 x3 x4 x5 x6 x7 x8 i.year, fe vce(robust)
Fixed-effects (within) regression Number of obs = 344
Group variable: company Number of groups = 79
R-sq: Obs per group:
within = 0.7422 min = 1
between = 0.3895 avg = 4.4
overall = 0.5404 max = 5
F(12,78) = 34.66
corr(u_i, Xb) = -0.2170 Prob > F = 0.0000
(Std. Err. adjusted for 79 clusters in company)
------------------------------------------------------------------------------
| Robust
y | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
x1 | .2848077 .1970388 1.45 0.152 -.1074664 .6770817
x2 | -3.275013 5.070523 -0.65 0.520 -13.36965 6.819623
x3 | -.3970197 .3520745 -1.13 0.263 -1.097946 .3039067
x4 | -12.74651 3.10502 -4.11 0.000 -18.92813 -6.564889
x5 | 1.70377 5.311331 0.32 0.749 -8.870278 12.27782
x6 | 10.22229 .8418369 12.14 0.000 8.546325 11.89826
x7 | -.0026877 .007624 -0.35 0.725 -.0178658 .0124905
x8 | -.1610713 .2465409 -0.65 0.515 -.6518966 .3297539
|
year |
2015 | 10.80228 2.416352 4.47 0.000 5.991693 15.61287
2016 | 9.692142 4.951764 1.96 0.054 -.1660623 19.55035
2017 | 8.934302 5.83122 1.53 0.130 -2.674764 20.54337
2018 | 17.87215 2.731239 6.54 0.000 12.43467 23.30963
|
_cons | 56.81684 57.05361 1.00 0.322 -56.76818 170.4019
-------------+----------------------------------------------------------------
sigma_u | 22.166669
sigma_e | 12.341649
rho | .7633655 (fraction of variance due to u_i)
------------------------------------------------------------------------------
.
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