Code:
. xtreg gini_disp kofgi educ urbanpop ln_gdppc ln_gdppc2, fe rob
Fixed-effects (within) regression Number of obs = 3,299
Group variable: countrycode Number of groups = 144
R-sq: Obs per group:
within = 0.0435 min = 1
between = 0.0942 avg = 22.9
overall = 0.0708 max = 46
F(5,143) = 1.49
corr(u_i, Xb) = 0.1196 Prob > F = 0.1970
(Std. Err. adjusted for 144 clusters in countrycode)
Robust
gini_disp Coef. Std. Err. t P>t [95% Conf. Interval]
kofgi .0707516 .0366188 1.93 0.055 -.0016324 .1431357
educ -.4209632 .4295601 -0.98 0.329 -1.270071 .428145
urbanpop -.0315681 .0603291 -0.52 0.602 -.1508202 .087684
ln_gdppc 2.531182 1.701013 1.49 0.139 -.8311967 5.89356
ln_gdppc2 -.1672039 .1138757 -1.47 0.144 -.3923011 .0578933
_cons 32.86099 6.423867 5.12 0.000 20.16299 45.559
sigma_u 7.3176726
sigma_e 1.6159013
rho .95350496 (fraction of variance due to u_i)
. xtreg gini_disp kofgi educ urbanpop ln_gdppc ln_gdppc2, re rob
Random-effects GLS regression Number of obs = 3,299
Group variable: countrycode Number of groups = 144
R-sq: Obs per group:
within = 0.0434 min = 1
between = 0.0969 avg = 22.9
overall = 0.0746 max = 46
Wald chi2(5) = 8.06
corr(u_i, X) = 0 (assumed) Prob > chi2 = 0.1531
(Std. Err. adjusted for 144 clusters in countrycode)
Robust
gini_disp Coef. Std. Err. z P>z [95% Conf. Interval]
kofgi .0727676 .0350403 2.08 0.038 .0040899 .1414453
educ -.4612618 .3936158 -1.17 0.241 -1.232735 .310211
urbanpop -.0306938 .0558209 -0.55 0.582 -.1401006 .0787131
ln_gdppc 2.541403 1.69703 1.50 0.134 -.7847153 5.867521
ln_gdppc2 -.1656411 .1133269 -1.46 0.144 -.3877578 .0564757
_cons 32.06784 6.391649 5.02 0.000 19.54044 44.59524
sigma_u 7.0196948
sigma_e 1.6159013
rho .94967672 (fraction of variance due to u_i)