Some Extensions and Tests for the CES Class of Production Functions

IN a recent pioneering paper Arrow, Chenery, Minhas, and Solow,' hereafter referred to as Arrow, et al., have proposed a new class of production functions of great flexibility. Essentially, they address themselves to the following problem: If it is given that a certain relationship exists between wages and output per man-hour, then what sort of production function rationalizes this relationship. Specifically if it is given that