{{Short description|American economist and professor}} {{Use mdy dates|date=July 2025}} {{Infobox scientist | name = Ronald W. Shephard | image = <!--(filename only, i.e. without "File:" prefix)--> | image_size = | alt = | caption = | birth_date = {{birth date |1912|11|22|mf=y}} | birth_place = | death_date = {{death date and age |1982|7|22 |1912|11|22}} | death_place = | fields = Mathematical economics | workplaces = | alma_mater = University of California, Berkeley | doctoral_advisor = Griffith C. Evans <!--(or | doctoral_advisors = )--> | academic_advisors = | doctoral_students = | notable_students = | known_for = Shephard's lemma | awards = }}
'''Ronald William Shephard''' (November 22, 1912 – July 22, 1982) was professor of engineering science at the University of California, Berkeley.<ref>{{Cite web|title=University of California: In Memoriam, 1988|url=http://content.cdlib.org/view?docId=hb967nb5k3;NAAN=13030&doc.view=content&chunk.id=div00051|access-date=|website=California Digital Library}}</ref>
He is best known for two results in economics, now known as Shephard's lemma and the Shephard duality theorem. Shephard proved these results in his book ''Theory of Cost and Production Functions'' (Princeton University Press, 1953), which Dale W. Jorgenson, in the preface of a reprint, called "the most original contribution to economic theory of all time."
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{{DEFAULTSORT:Shephard, Ronald}} Category:1982 deaths Category:1912 births Category:Fellows of the Econometric Society Category:20th-century American economists Category:20th-century American statisticians {{US-economist-20thC-stub}}