Hernán Vallejo2026-03-222026-03-22202110.2139/ssrn.3891831https://doi.org/10.2139/ssrn.3891831https://andeanlibrary.org/handle/123456789/70569enMathematical economicsEconomicsLawMathematicsLaw and economicsPolitical scienceA Theorem of the Law of Demandarticle