Weird stoch_simul

Hello,
I am trying to understand this code:
What is it exactly doing? it is similar to the github for gali chapter 4
Thanks in advance!

stoch_simul(order=1,irf=0,noprint) l y x pi de s;
l_pos=strmatch(‘l’,var_list_ ,‘exact’);
variance.l=NaN(1,length(r_pi_vec))
[info, oo_, options_] = stoch_simul(M_, options_, oo_, var_list_)
;welf_PEG.mod (8.3 KB)

Hi Alisa,

l_pos=strmatch('l',var_list_ ,'exact');

would like to find the position of labor in the var_list_, after we run

stoch_simul(order=1,irf=0,noprint) l y x pi de s;

such that in line 202, dynare will return the variance of l :

variance.l(ii)=oo_.var(l_pos,l_pos);

In some cases, I manually find the position of l in oo_.var in the workspace/variable window, for example, here the 1st postion:

variance.l(ii)=oo_.var(1,1);

I think this command is also okay. BTW, the latest version of MATAB suggests using “string compare” find(strcmp()) to replace strmatch “string match”.

Then

variance.l=NaN(1,length(r_pi_vec))

is about looping over parameters, one hot link is

Note line 182-183:

r_pi_vec=[1.5   1.5 5 1.5];
r_x_vec =[0.125 0   0 1  ];

They seem to be four alternative regimes. Each time, we assign new values to

    set_param_value('r_pi',r_pi_vec(ii));
    set_param_value('r_x',r_x_vec(ii));

r_pi is one-to-one to r_x. The whole loop will be executed 4 times in all.

    [info, oo_, options_] = stoch_simul(M_, options_, oo_, var_list_); %loop over stoch_simul
    if ~info(1)
        %read out current parameter values

If info number is not 1 (error), after running stoch_simul, oo_ and options_ will be updated.

My explanation may contain (many) errors. Please read it with caution.

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