Hey, can someone here help me? I only started with dynare. In this modfile there is a positive technology shock in the RBC model. What do I need to change in order to create a shock in different variables? e.g. a shock in capital

Thank you so much

var c y i k n w r rk a z;

varexo eps_a;

parameters beta varphi alpha delta mu rho sigma_a;

beta = 0.99;

varphi= 1;

alpha = 0.36;

delta = 0.025;

mu = (delta*alpha) / ((1/beta)-1+delta);

rho = 0.9;

sigma_a = 1;

model (linear);

c = c(+1)-r(+1);

k = k(-1) * (1-delta) + delta*i;
r = (1 - beta*(1-delta)) * rk;

w = y - n;

rk = y - k(-1);

y = a + alpha * k(-1)+ (1-alpha)*n;

a = z;

a = a(-1)*rho + eps_a;

y = (1-mu)

*c + mu*i;

n = (1/varphi) * w - (1/varphi) * c;

end;

shocks;

var eps_a;

stderr sigma_a;

end;

stoch_simul(irf=40);