The concept of the energy, water, and land (EWL) nexus encompasses a growing concern on the availability of vital resources derived from these intertwined systems, and how to manage the nexus resources to respond to the challenges posed by future human demands, aggravated by the perspective of...

The translog function is a flexible form but does not have good global properties. The CES function has good global properties but is not a flexible form. For energy demand models that should be valid in a large domain, global properties are important.