Authors' headline: the 1976 simple own-price elasticities from Model I (compensation term included, Table 1), which they present as estimates 'free of' the incentive-payment confounding. || 'All of the simple own-price elasticities are negative, statistically significant, and decidedly inelastic.' (p.61); 'provide some estimates of time-of-day price elasticities that are free of its confounding effects' (p.59)
Hill, D. H., D. A. Ott, L. D. Taylor and J. M. Walker (1983): “Incentive Payments in Time-of-Day Electricity Pricing Experiments: The Arizona Experience.” The Review of Economics and Statistics 65(1), 59-65