2. Between 1995 and 2005, the own-price elasticity of the demand for water among urban residential users ranged between a high of -0.20 in October to a low of -0.06 in December. Among urban commercial users, the own-price elasticity of demand ranged from a high of -0.17 in December to a low of -0.08 in January. (Source: David R. Bell and Ronald C. Griffin, "Urban water demand with periodic error correction", Land Economics, Vol. 87 No. 3, August 2011, 528-544.)