← Search American Economic Review Vol. 83 No. 1 1993 Monopolistic Competition and Optimum Product Diversity: Comment Xiaokai Yang; Ben J. Heijdra Volume83 Issue1 Pages295-301 Sources bibtex:phds-export.bib 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 ✓