A generalized multiplicative directional distance function for efficiency measurement in DEA
A generalized multiplicative directional distance function (GMDDF) is developed to measure technical efficiency (TE). GMDDF serves as a comprehensive measure of TE by accounting for all types of slacks. GMDDF satisfies several desirable properties of an ideal efficiency measure. GMDDF encompasses the existing multiplicative measures of TE as special cases. To demonstrate the ready aptness of GMDDF for measuring TE, an illustrative empirical analysis is presented.
generalized multiplicative directional distance function multiplicative directional distance function data envelopment analysis log-convexity piece-wise log-linear technology