← Search Econometrica Vol. 39 No. 6 1971 Principles of Econometrics P. J. Lund; Kong Chu DOI10.2307/1909685 Volume39 Issue6 Pages1061 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 ✓