← Search Econometrica Vol. 30 No. 2 1962 The Efficiency of the Coal Industry. An Application of Linear Programming Rudolf Henn; James M. Henderson DOI10.2307/1910227 Volume30 Issue2 Pages382 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 ✓