Hi everyone,
I am running a fixed effects regression. Upon choosing "i.country" for country fixed effects I get following error. However, using xi: regress y x1 i.country does not omit the country effects. Can anybody please tell me, how can I fix this problem?

.
xtreg LnPluriAVE lntotal lnspfield lnsphorti lnspperma lnspgrazing lnspgranivore lnmixedcropping l
> nmixedlivestock lnmixedcroplivestock lnyoung lnmiddle lnold lnsmall lnmedium lnlarge i.country1, f
> e
note: 2.country1 omitted because of collinearity
note: 3.country1 omitted because of collinearity
note: 4.country1 omitted because of collinearity
note: 5.country1 omitted because of collinearity
note: 6.country1 omitted because of collinearity
note: 7.country1 omitted because of collinearity
note: 8.country1 omitted because of collinearity
note: 9.country1 omitted because of collinearity
note: 10.country1 omitted because of collinearity
note: 11.country1 omitted because of collinearity
note: 12.country1 omitted because of collinearity
note: 13.country1 omitted because of collinearity
note: 14.country1 omitted because of collinearity
note: 15.country1 omitted because of collinearity
note: 16.country1 omitted because of collinearity
note: 17.country1 omitted because of collinearity
note: 18.country1 omitted because of collinearity
note: 19.country1 omitted because of collinearity
note: 20.country1 omitted because of collinearity
note: 21.country1 omitted because of collinearity
note: 22.country1 omitted because of collinearity
note: 23.country1 omitted because of collinearity
note: 24.country1 omitted because of collinearity
note: 25.country1 omitted because of collinearity
note: 26.country1 omitted because of collinearity
note: 27.country1 omitted because of collinearity
note: 28.country1 omitted because of collinearity

Fixed-effects (within) regression Number of obs = 133
Group variable: country1 Number of groups = 28

R-sq: Obs per group:
within = 0.5798 min = 2
between = 0.7615 avg = 4.8
overall = 0.7580 max = 5

F(15,90) = 8.28
corr(u_i, Xb) = -0.3635 Prob > F = 0.0000

---------------------------------------------------------------------------------------------------
LnPluriAVE | Coef. Std. Err. t P>|t| [95% Conf. Interval]
----------------------------------+----------------------------------------------------------------
lntotal | -1.909874 .7726628 -2.47 0.015 -3.444903 -.3748443
lnspfield | .2538255 .1363297 1.86 0.066 -.0170172 .5246683
lnsphorti | .0962469 .0893718 1.08 0.284 -.0813058 .2737996
lnspperma | .1256348 .0688858 1.82 0.071 -.0112189 .2624885
lnspgrazing | .5208192 .2335448 2.23 0.028 .0568417 .9847967
lnspgranivore | .0150322 .0587375 0.26 0.799 -.1016601 .1317245
lnmixedcropping | .1132181 .0897801 1.26 0.211 -.0651457 .2915818
lnmixedlivestock | -.1914995 .0964795 -1.98 0.050 -.3831728 .0001739
lnmixedcroplivestock | .1539532 .2144529 0.72 0.475 -.2720949 .5800012
lnyoung | .4042698 .1390657 2.91 0.005 .1279916 .680548
lnmiddle | -.3908594 .3313899 -1.18 0.241 -1.049223 .2675044
lnold | 1.258012 .3266444 3.85 0.000 .6090757 1.906948
lnsmall | .608423 .2736649 2.22 0.029 .0647399 1.152106
lnmedium | -.1843188 .2121879 -0.87 0.387 -.6058671 .2372295
lnlarge | -.1953308 .1453667 -1.34 0.182 -.4841271 .0934655
|
country1 |
Belgium | 0 (omitted)
Bulgaria | 0 (omitted)
Croatia | 0 (omitted)
Cyprus | 0 (omitted)
Czechia | 0 (omitted)
Denmark | 0 (omitted)
Estonia | 0 (omitted)
Finland | 0 (omitted)
France | 0 (omitted)
Germany (until 1990 former te..) | 0 (omitted)
Greece | 0 (omitted)
Hungary | 0 (omitted)
Ireland | 0 (omitted)
Italy | 0 (omitted)
Latvia | 0 (omitted)
Lithuania | 0 (omitted)
Luxembourg | 0 (omitted)
Netherlands | 0 (omitted)
Norway | 0 (omitted)
Poland | 0 (omitted)
Portugal | 0 (omitted)
Romania | 0 (omitted)
Slovakia | 0 (omitted)
Slovenia | 0 (omitted)
Spain | 0 (omitted)
Sweden | 0 (omitted)
United Kingdom | 0 (omitted)
|
_cons | 5.772421 2.403675 2.40 0.018 .9971003 10.54774
----------------------------------+----------------------------------------------------------------
sigma_u | .81263108
sigma_e | .18187944
rho | .95229626 (fraction of variance due to u_i)
---------------------------------------------------------------------------------------------------
F test that all u_i=0: F(27, 90) = 9.35 Prob > F = 0.0000