This single coefficient IS the study's headline electricity own-price elasticity, reported in the abstract-level results and Table 3 comparison || 'The short-run own-price elasticity of electricity estimated in this study is -0.078 (±0.011).' (p.74)
Parfomak, P. W. and L. B. Lave (1996): “How Many Kilowatts Are in A Negawatt?: Verifying Ex Post Estimates of Utility Conservation Impacts at the Regional Level.” The Energy Journal 17(4), 59-87