Authors explicitly designate model (2) (system GMM, gas-penetration treated as endogenous, 15C/22C thresholds) as the model whose elasticities they interpret || 'For these reasons, the explanation of coefficients and the computation of the short and long-run price and income elasticities will refer specifically to the results obtained in model (2).' (p.654); Table 5 reports SR price elasticity -0.07 and LR -0.19 for model 2 (p.655)
Blazquez, L., Boogen, N., & Filippini, M. (2013): "Residential electricity demand in Spain: New empirical evidence using aggregate data." Energy Economics, 36, 648–657.