The paper is titled and framed around the RURAL cooperatives' residential demand; the state-level model (Table 5) is presented only as a comparison. The headline own-price elasticities are the 5 rural short-run coefficients (Table 1 / Table 3). || 'The short-run price elasticity ranges from -0.13 in the Western region to -0.22 in the Southeast.' (p.154)
Maddigan, R. J., W. S. Chern and C. G. Rizy (1983): “Rural Residential Demand for Electricity.” Land Economics 59(2), 150-161