Efficiency and the production function

M. J. Farrell: The Measurement of Productive Efficiency, Journal of the Royal Statistical Society, Series A, Part III,120 (1957). pp 253–290.

F. R. Försund and L. Hjalmarsson: On the Measurement of Productive Efficiency, Swedish Journal of Economics,76 (2) (1974) pp. 141–154.

R. W. Shephard: Theory of Cost and Production Functions, Princeton 1970.

R. W. Shephard: “Semi-Homogeneous Production Functions”, in Lecture Notes in Economics and Mathematical Systems, Vol. 99, entitled: Production Theory, Berlin-Heidelberg-New York 1974.

R. W. Shephard and R. Färe: The Law of Diminishing Returns, Zeitschrift für Nationalökonomie34 (1974) pp. 69–90.