Cost_ire in endogenous trade

[Antti-L]

Thanks for your post. However, I could not see any attachment.

As you say, normally COST_IRE should have opposite values in the import and export regions, and the sum of all COST_IRE over all regions should be zero. I cannot recall having seen differing absolute values myself, and so I would like to see an example in order to try and explain it. 

One possible case is trading regions that have different timeslices, where the timeslice conversion might result in non-matching import/export costs.