Thank you for your answer. I did that but I think that maybe the problem comes from the fact that I choose arbitrary values for debt/GDB and G/GDP at steady state. Let me explain:
At steady state my consumption of the patient holder is this:
iI have chosen debt/GDP=0.358 and G/GDP=0.195 and I have normalized Y=1 at steady state. With the good market equilibrium I would deduct consumption of impatient household since c_patient= Y-c_patient-I-G. But maybe it makes no sense to choose arbitrary values for debt/GDP and G/GDP and this makes my computation wrong.
I have the following fiscal rules for G:
G=G(-1)^(rho_G) * G_over_GDP_steady_state^(1-rho_G) * ((b_g/Y(-1))(1/Dette_over_GDP_steady_state))^(1-rho_G) * exp(sigma_Gepsilon_G);
Can I use any value for debt/GDP and G/GDP ? I think the problem comes from here because I did the computation a lot of times to determine consumption at steady state and I can’t find where the error comes from.