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Stata in such a situation, can you tell me why?

Time:09-30

Xtreg F1 lnSub1 lnRmw1 lnPop1 lnTrans1 lnEdu1 lnland1, fe
Note: lnSub1 omitted because of collinearity
Note: lnRmw1 omitted because of collinearity
Note: lnPop1 omitted because of collinearity
Note: lnTrans1 omitted because of collinearity
Note: lnEdu1 omitted because of collinearity
Note: lnland1 omitted because of collinearity

Fixed - effects (within) regression Number of obs=295
The Group variable: A Number of groups=295

R - sq: Obs per group:
The within=. Min=1
Between=. Avg=1.0
Overall=. Max=1

F (0, 0)=0.00
Corr (u_i, Xb)=. Prob> F=.


F1 Coef. Std. Err. T P> t [95% Conf. Interval]

LnSub1 0 (omitted)
LnRmw1 0 (omitted)
LnPop1 0 (omitted)
LnTrans1 0 (omitted)
LnEdu1 0 (omitted)
Lnland1 0 (omitted)
_cons -. 03032.....

Sigma_u. 7953651
Sigma_e.
Rho. (fraction of variance due to u_i)

F the test that all u_i=0: F=(294, 0). The Prob>=F.