Some argue that the price elasticity of demand can be used todetermine whether a good or service is a luxury or a necessity. Inmedical care, a procedure with an elastic demand would beconsidered optional, or elective, and a procedure with an inelasticdemand would be a medical necessity. Should planners use priceelasticity of demand as a guide to defining services that aremedically necessary? What are the advantages of such aclassification scheme? What are the drawbacks? . . .