Elastic electricity prices in the IMPEXP region

[Antti-L]

In your case, as you don't seem to want to make use of the automatic transfer of reference prices and quantities from a Baseline run, it might be more transparent to simply use several import/export processes/commodities for defining several cost steps for the exogenous imports/exports.

This is the usual way of defining a supply-cost curve in TIMES. You could model several import processes with different prices/costs, and bounds for the volumes in each step.  Alternatively, because the imports are exogenous, you could also use a single process with several commodities to define the cost steps, thereby retaining a common capacity for all of the steps. Then you would still need to aggregate the different cost steps.