Author's preferred electricity elasticity is the implied value from the fixed-effects (column 3) specification, which purges the endogeneity bias of the cross-sectional estimates || 'The elasticities are derived using the estimate of the price elasticity from column (3) in Table 3' and 'using the estimate from column (1) in Table 3, the implied price elasticity for electricity is -.08 rather than -.02' (p.543)
Davis, L. W. (2008): "Durable goods and residential demand for energy and water: evidence from a field trial." The RAND Journal of Economics, 39(2), 530–546.