← Search Econometrica Vol. 48 No. 6 1980 Gross Substitutability with Multi-Valued Excess Demand Functions Peter Howitt DOI10.2307/1912827 Volume48 Issue6 Pages1567 Sources bibtex:phds-export.bib semanticscholar crossref openalex Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓