← Search Journal of Political Economy Vol. 89 No. 2 1981 Prior Information and the Observational Equivalence Problem Warren E. Weber Volume89 Issue2 Pages411-415 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 ✓