Kumbhakar SC, L Hjalmarsson and A Heshmati (1995). “Efficiency of the Swedish Pork Industry: A Farm Level Study Using Rotating Panel Data 1976-1988.” EJOR 80(3): 519-533.
Kumbhakar SC, L Hjalmarsson and A Heshmati (1995). “Efficiency of the Swedish Pork Industry: A Farm Level Study Using Rotating Panel Data 1976-1988.” EJOR 80(3): 519-533.