Reference-point regressions 1 (static) and 2 (dynamic) from Table 2 are the paper's headline specs; authors prefer the Henderson 2SLS-error-components estimator that generates them || 'For the reasons given earlier we prefer the Henderson estimates.' (p.15); long-run price elasticity 'cluster around -0.5' (p.10)
Westley, G. D. (1989b): "Commercial Electricity Demand in A Central American Economy." Applied Economics 21(1), 1-17