The paper's only own-price elasticity of electricity demand (untabulated Equation 7 full-panel estimate); the authors present it as their price-elasticity finding and benchmark it against Reiss & White (2005) and Borenstein (2009). || "When we use the full panel to investigate the effects of price changes on electricity purchases (Equation 7), we obtain a statistically insignificant coefficient of -0.126 (σ̂=.081) on the logarithm of the price of electricity (full results not shown)." (p. 22, printed page)
Costa, D. L., & Kahn, M. E. (2010): 'Why has California's residential electricity consumption been so flat since the 1980s? A microeconometric approach.' NBER Working Paper 15978.