  The Model combines IPM and EIA cost elements that use similar -- but not identical -- assumptions on capital recovery and aggregate cost data in a similar -- but not identical -- regional manner that needs adjustment.
The Model does not combine IPM and EIA costs. 
mnli hypothesis: The Model does not combine IPM and EIA costs.  premise:   The Model combines IPM and EIA cost elements that use similar -- but not identical -- assumptions on capital recovery and aggregate cost data in a similar -- but not identical -- regional manner that needs adjustment.