← Search Econometrica Vol. 37 No. 2 1969 The Covariance Matrix of the Limited Information Estimator and the Identification Test Ta-Chung Liu; William J. Breen DOI10.2307/1913532 Volume37 Issue2 Pages222 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 ✓