Speed up the gams execution

GAMS
1

Hello and happy new year to all.

I’m working on an economic model in which I initially had a reduced number of variables and equations. At that level the model worked properly.

Now as I incorporated a very large number of households in order to capture another aspect of my issues, the execution process becomes very slow. It can take more than 24 hours as I observe to display the output. And I’m not sure yet that at the end of the process the results will be correct.

Actually I have 445,574 equations and 445,698 variables.

I use the version 25.0.3 of gams

Can someone help me with a convenient guide to overcome that?

Your reactions will be very usefull

Thanks in advance.

Rodrigue

2

Hi
You could try to use the techniques of Tom Rutherford for decomposing the model into a detailed household part and an economic model with one aggregated household. He used this technique to do an analysis for Russia with 55’000 households as described in Rutherford, Tarr, and Shepotylo (2008) https://ideas.repec.org/a/eee/inecon/v75y2008i1p131-150.html.
Cheers
Renger

3

Thank you very much Renger for your reply. It’s very interesting.

Rodrigue