One study found that the price elasticity of demand for soda is minus−​0.78, while the price elasticity of demand for​ Coca-Cola is minus−1.22. ​Source: Kelly D.Brownell and Thomas R.​Frieden,"Ounces of Preventionlong dash—The Public Policy Case for Taxes on Sugared​ Beverages," New England Journal of Medicine​, April​ 30, 2009, pp. 1805minus−1808. The price elasticity of​Coca-Cola is ​(interpret the absolute value of these​elasticitiies, i.e., ignore the minus sign​):