"Energy is a key resource for transformational development globally. Oil and gas continue to play a key role in this sector irrespective of the gradual transition towards renewables and will continue to do so in most developing and emerging economies in the near future. The industry is complex...

This paper studies whether the commonly used linear parametric model for estimating aggregate energy demand is the correct functional specification for the data generating process. Parametric and nonparametric econometric approaches to analyzing aggregate energy demand data for 17 OECD countries...