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Directional distance functions and undesirable outputs
Chung, Yangho, (1996)
The value of convertibility : paper presented at the Annual Meeting of the Western Economic Association, June 20, 1977, in Anaheim, California
Grier, Paul, (1977)
Four questions on joint production
Baldone, Salvatore, (1988)
Efficiency measurement by data envelopment analysis with econometric applications
Sengupta, Jati K., (1988)
Evaluation of investment portfolios : some tests of robustness and diversification
Sengupta, Jati K., (1987)
Tests of efficiency of limited diversification portfolios
Sengupta, Jati K., (1985)