Dynare forums

Hi,

I am learning simulation under both deterministic and stochastic shocks. Specifically, I use the RBC model provided by dynare, 'ramst.mod', exteneded to allow for a deterministic technology shock "x" and a stochastic technology shock "y". And use "stoch_simul(irf=0);" and "forecast(periods=1000)" to do the simulation.

The problem is that the initial condition that I specified is different from the initial values in the simulation result.

Specifically, I state the initial condition as follows,

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initval;
x = 0.8;
y=0;
k = ((delt+bet)/(1.0*aa*alph))^(1/(alph-1));
c = aa*k^alph-delt*k;
end;
steady;

which gives,

Code: Select all

c                      0.979592
k                      8.16327


But in the simulated result, I obtain a different initial state:

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>> c_initial=oo_.forecast.Mean.c(1)

c_initial =

    1.2244

>> k_initial=oo_.forecast.Mean.k(1)

k_initial =

   10.1862


I attached my codes. can anyone help take a look and let me know what goes wrong? besides, i am also wondering if the values for stochastic shocks used in "forecast" are zero? Thank you for your time in advance.