Injectivity and the law of demand

Roy Allen

Economics Letters, 2022, vol. 215, issue C

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.

Keywords: Complementarity; Injectivity; Law of demand (search for similar items in EconPapers)
Date: 2022
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Working Paper: Injectivity and the Law of Demand (2019)
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecolet:v:215:y:2022:i:c:s0165176522001252

DOI: 10.1016/j.econlet.2022.110496

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