The abstract and conclusions headline the -0.38 to -0.40 range covering both estimated models (piped-gas dummy and Heckman selection); the authors treat the two specifications as jointly establishing their result and single out neither, so both coded at-mean rows (-0.403 and -0.407, Table 10) are preferred. || "The results are consistent with other publications, showing a price elasticity between -0.38 and -0.40 for residential consumption" (p. 1, PDF page; abstract); "The magnitude of this effect is consistently estimated to be between -0.38 and -0.4" (p. 22, PDF page; conclusions)
Agostini, C. A., Plottier, M. C., & Saavedra, E. H. (2015): 'Elasticities of residential electricity demand in Chile.' Working paper (Dec 2015).