//-->
A Nonparametric Analysis of the Source and Nature of Technical Change: the Case of U.S. Agriculture
CHAVAS, JEAN-PAUL, (1994)
A Primal-Dual Approach to Nonparametric Productivity Analysis: the Case of U.S. Agriculture
A Generalized Distance Function and the Analysis of Production Efficiency
CHAVAS, JEAN-PAUL, (1999)