Author's headline own-price elasticity is the Model A value -0.651, stated in the abstract-adjacent results text and repeated in discussion; Model B is a robustness check with time dummies. || 'As it is a log-log variable, the estimated coefficient can be interpreted as elasticity. The estimated price elasticity is -0.651 and income elasticity 0.397' (p.5); 'Model B is prepared in order to verify the robustness of the results' (p.5).
Otsuka, A. (2017): "Determinants of efficiency in residential electricity demand: stochastic frontier analysis on Japan." Energy, Sustainability and Society, 7(1), 1-10.