On Thu, 5 Jan 2012, Henrique Andrade wrote:
 Thanks for your replies. But I think I find another little mistake
in
 the Kalman Filter chapter. The equation 27.1 (state equation) has in
 its right hand side the term "v_t", but I think it is "v_t+1", am I
 right? 
I'll have to double-check, but I don't think so. There's more than 
one way of representing the Kalman filter, and I believe the 
documentation correctly reflects the representation used by gretl.
Allin Cottrell