← Search American Economic Review Vol. 67 No. 3 1977 Weak Invisible Hand Theorems on the Sustainability of Multiproduct Natural Monopoly William J. Baumol; Elizabeth E. Bailey; Robert D. Willig Volume67 Issue3 Pages350-365 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 ✓