Regression for fixed effects with Proc GLM or Proc Panel ?

[KarimaTouati]

Hello, 

I am trying to ansewer to the below problem :

using Proc GLM :

PROC SORT
	DATA=TAB2 (keep= Country Sex Age Group year EmployPop ImmiShare )
	OUT=Sorted_TAB2;
	BY Group ;
RUN;

TITLE "Model M1";
Proc glm Data=Sorted_TAB2;
class year country ;
model EmployPop=ImmiShare/solution alpha=0.05 ;
by group ;
quit;

But  I am confused if my model is right or not since I have fixed effects (group, year and country).

Proc GLM or Proc Panel can give the same result ?

And if it is right using absorb or class is it the same in my case ? Proc Sort by group is necessary ?

And How Can I explicit  the null and alternative hypotheses, the test statistic, the rejection rule and the degrees of freedom.

Any help will be appreciated.

PS: this is an overview of my data :