Authors present all 15 industry own-price elasticities as the headline result and repeatedly cite the range endpoints; no single point estimate is preferred || 'the short-run price elasticity of demand ranges from -0.14 for SIC 263 to -1.47 for SIC 203, indicating a substantial variation of industries' responsiveness to price changes' (p. via Table 2 text)
Chang, H. S., and W. S. Chern (1981b): “A Study on the Demand for Electricity and the Variation in the Price Elasticities for Manufacturing Industries.” Journal of Economics and Business 33(2), 122-131