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The relative technical efficiency of slave and non-slave farms in Southern agriculture
Grabowski, Richard, (1989)
One kind of freedom : the economic consequences of emancipation
Ransom, Roger L., (2001)
The slaves' economy : independent production by slaves in the Americas
Berlin, Ira, (1991)
The relative technical efficiency of Northern and Southern US farms in 1860
Grabowski, Richard, (1988)
The technical efficiency of Japanese agriculture, 1871 - 1940