Model_comparion help

[Nice]

Hello Jpfeifer,

I am trying to compare two models that I have estimated and after using the command model_comparison model1 model2;

I get the following error " Not enough input arguments"

I thought it may have been because dynare wants me to specify a prior over the models but even when I do so I get the same error. The only thread somewhat related to this that I found was this one:

A basic question for model comparison

Hi Jiho, I never use this function (so I don’t know how to call it)… But you don’t really need it if you want to compare two (or more models). You just have to compare the marginal densities (eventually weighted by a discrete prior distribution over the models). Say you have two models A and B to be compared. You write two mod files A.mod and B.mod where you define the models and write all is needed to estimate each model. After the estimation, you can execute the following command on the matl…

Am I to understand that I can obtain the posterior odds ratio as follows = posterior probability of model A/ posterior probability of model B?

Many Thanks!

[jpfeifer]

What exactly did you do after estimating the models? Which command did you use?

[Nice]

Hello jpfeifer,

I estimated each model ( model1.mod and model2.mod) using the estimation command, and then in the command window I typed the following:

model_comparison model1 model2;

It gave me the error

model_comparison : The user supplied prior distribution over models is improper…
model_comparison: The distribution is automatically rescaled!
Error using model_comparison (line 50)
Not enough input arguments.

Many Thanks,

[jpfeifer]

In that command window that won’t work. Try putting just this line into a mod-file and then run Dynare on it.