Hi;
 
I´ve a dubt. When I choose in Gretl: Model->Time series-> Autoregressive estimation, if I try estimating the model without constant, Gretl tells me "Error in data", but if I include the constant it makes the estimation correctly, why does it occurs? is it a bug, isn't it? 
On the other hand, if I select copy output (with RTF-MS Word), the estimated coefficients don´t be pasted while the rest of output is pasted
 
Cheers
Javi



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