Elasticity may refer to: Elasticity (physics), continuum mechanics of bodies which deform reversibly under stress Various uses are derived from this physical sense of the term, especially in economics: Elasticity (economics), a general term for a ratio of change. For more specific economic forms of elasticity, see: Price elasticity of demand Price elasticity of supply Income elasticity of demand Cross elasticity of demand Output elasticity Elasticity of substitution Frisch elasticity o… (More on Elasticity)