← Search Econometrica Vol. 31 No. 1/2 1963 Optimal Aggregation in Multi-Equation Prediction Models Walter D. Fisher DOI10.2307/1910986 Volume31 Issue1/2 Pages300 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 ✓