Authors' headline is the long-run direct own-price elasticity 'at least unity'; the static structural equation (-1.15) is the primary estimate carried into the abstract/conclusions, the dynamic runs are robustness checks || 'The results indicate that the long-run own-price elasticity of demand is equal to at least unity' (p.12); 'All estimates of the own-price elasticity lie within the range -1.00 to -1.21' (p.15)
Halvorsen, R. (1975): “Residential Demand for Electric Energy.” Review of Economics and Statistics 57(1), 12-18