Hello:
I am using R 3.0.2.  
I have panel data on countries' renewable energy net generation (and installed 
capacity) over time.  I am regressing these dependent variables on various 
socioeconomic variables, as well as binary policy variables.  I have have done 
basic OLS, but I wanted to explore both fixed effects models, as there are 
likely significant country effects (using plm) and robust regression (using 
rlm), as Q-Q plots indicate that there are some strong outliers.  This might be 
a question of apples and oranges, but how do I compare the goodness of fit of 
the fixed effects models with the robust regression models?  One can use 
F-tests to compare OLS and the fixed effects, and since the OLS and robust 
regressions have the same number of DFs, looking at the residual standard error 
is insightful.  Any help would be appreciated.
Cheers,
Michael

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