← Search Econometrica Vol. 32 No. 4 1964 Forms of Engel Functions C. E. V. Leser DOI10.2307/1910207 Volume32 Issue4 Pages732 Sources semanticscholar openalex crossref 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 ✓