Need Help on Initial Values Setting

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Need Help on Initial Values Setting

Postby Chazz » Mon Jan 31, 2011 4:06 pm

Hello,
I am trying to compute the steady state for the file attached below (with the data for estimation).
When I run the code, I get an error message indicating that the initial values are incompatible with some of the steady state equations.
I am also worried about the huge value found for the log posterior. Does the problem has anything to do with this?

Initial value of the log posterior (or likelihood): -2762594.3573

Max Line search Directional First-order
Iter F-count f(x) constraint steplength derivative optimality Procedure
0 43 2.76259e+006 -0.01
STEADY: numerical initial values incompatible with the following equations
2 3 34 47 48


If anybody has tips about the appropriate choice for initial values, please, keep me posted.

Thank you in advance,

Best Regards.
Attachments
data.xls
(3.92 KiB) Downloaded 99 times
buildata.m
(1.94 KiB) Downloaded 107 times
model.mod
(15.78 KiB) Downloaded 85 times
Chazz
 
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Re: Need Help on Initial Values Setting

Postby Chazz » Mon Jan 31, 2011 4:12 pm

Oups! I forgot to say that I had to change the "data" file extension to .xls because .csv cannot be uploaded.
Chazz
 
Posts: 2
Joined: Mon Jan 31, 2011 1:04 am

Re: Need Help on Initial Values Setting

Postby SébastienVillemot » Mon Feb 07, 2011 11:20 am

This error means that some parameters are either not set, or are set to problematic values (for example a zero which is then used inside a log, or a negative value inside a non-integer power).

The problem occurs on your 2nd equation, on the 3rd, the 34th...

You need to manually investigate all the above equations to find where the numeric issue is.
Sébastien Villemot
Economist at OFCE – Sciences Po
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