Full-sample (1955-78) estimate uses the entire dataset and anchors the paper's declining-responsiveness thesis; the paper presents the whole elasticity series rather than one number, and reports SR/LR endpoints -0.801 & -0.113 || "For the first run for 1955-64, the estimated short-run and long-run price elasticities are -0.801 and -1.360... The corresponding estimates from the last regression for 1969-78 are only -0.133 and -0.498" (p.217); full-sample In PE = -0.115 (Table 1, run 0, p.216)
Chern, W.S., and E. Bouis (1988): “Structural Changes in Residential Electricity Demand.” Energy Economics 10(3), 213-222