Neither coded cell is the author's preferred estimate. The author's headline model is the price-free Energy-Output VEM chosen for the simulations; the price/income model is explicitly an ad hoc rough approximation, and the EC/PA models are borrowed from other forecasters (Stipdonk 1988). No coded cell qualifies as preferred. || 'we may nevertheless use such a model as a rough approximation (or as an ad hoc model) for analyzing the "pricing" effects on electric load, although the results should be interpreted with care' (p.10-11); EC and PA are 'two dynamic energy demand models currently used by other forecasters (Stipdonk 1988)' (p.8)
Keng, C.W. K. (1991): “Forecasting Energy Demand with Variable Elasticity Models.” In: Energy Developments in the 1990’s: Challenges Facing Global/Pacific Markets (eds. Fereidun Fesharaki and James P. Dorian). IAEE 14th Annual International Conference Proceedings, Honolulu, July 8-10, 1991, 3-28