Ronald Shephard
Encyclopedia
Ronald William Shephard was Professor of Engineering Science at the University of California, Berkeley.http://content.cdlib.org/view?docId=hb967nb5k3;NAAN=13030&doc.view=content&chunk.id=div00051
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).
He is best known for two results in economics, now known as Shephard's lemma
Shephard's lemma
Shephard's lemma is a major result in microeconomics having applications in the theory of the firm and in consumer choice. The lemma states that if indifference curves of the expenditure or cost function are convex, then the cost minimizing point of a given good with price p_i is unique...
and the Shephard duality theorem. Shephard proved these results in his book Theory of Cost and Production Functions (Princeton University Press, 1953).