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Injectivity and the law of demand

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  • Allen, Roy

Abstract

A variety of methodologies require demand to be injective to invert quantities to prices or utility indices. When a version of the law of demand holds, global injectivity and local injectivity are equivalent. Moreover, both can be checked by seeing whether the demand mapping is constant over any line segments.

Suggested Citation

  • Allen, Roy, 2022. "Injectivity and the law of demand," Economics Letters, Elsevier, vol. 215(C).
    • Handle: RePEc:eee:ecolet:v:215:y:2022:i:c:s0165176522001252
    DOI: 10.1016/j.econlet.2022.110496
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    References listed on IDEAS

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