Dynare forums

Hi all,

I'm new to dynare and have some questions regarding how it works. So I have a very simple stochastic model below (where each endogenous variable is in logs, i.e. model will be log-linearized):

var c k lab z;
varexo e;
parameters bet the del alp tau rho s;

bet = .987;
the = .357;
del = .012;
alp = .4;
tau = 2;
rho = .99;
s = -.1;

model;

(((exp(c)^the) * (1-exp(lab))^(1-the))^(1-tau)) / exp(c) = bet * ((((exp(c(+1))^the) * (1-exp(lab(+1)))^(1-the))^(1-tau)) / exp(c(+1))) *
(( 1 + alp * exp(z(-1)) * exp(k(-1))^(alp-1))* (exp(lab)^(-alp)) - del);

exp(c) = (the / (1-the)) * (1-alp) * exp(z(-1)) * (exp(k(-1))^alp) * (exp(lab)^(-alp)) * (1-exp(lab));

exp(k) = exp(z(-1)) * exp(k(-1))^alp * exp(lab)^(1-alp) - exp(c) + (1-del)*exp(k(-1));

z = rho*z(-1) + s*e;

end;

//Steady state values that work: k = 7.29, c=-1.19042, lab=-0.0496051
initval;
k = 7.29;
c = -1.19;
lab = -.0496051;
z = 0;
e = 0;
end;

shocks;
var e;
stderr 1;
end;

steady(solve_algo = 2);

stoch_simul(periods=1000,irf=400);


I don't understand what periods are (periods = 1000) and how shocks are applied to this model. What is calculated in each period? How is each endogenous variable calculated in each period? What does a 1 standard deviation shock mean?

I appreciate your help!

You should read the manual. Using the decision rules of the solved model, random shocks are drawn for each simulated period from a normal distribution with the specified standard deviation.