Authors' explicit preferred long-run electricity estimate is the pooled -0.62 (obs 1240) || "the preferred long run estimate for gas is -0.16 and for electricity, -0.62" (p.13, text; Table 6, p.11) and "The price elasticity values-- -0.16 for gas and -0.62 for electricity --perhaps best reflect the price elasticities" (p.9)
Green, R. D., A. G. Salley, G. Grass, and A. S. Osei (1986): “The Demand for Heating Fuels: A Disaggregated Modeling Approach.” Atlantic Economic Journal 14(4), 1-14