Mariam, Yohannes; Coffin, Garth - Volkswirtschaftliche Fakultät, … - 1993
and milk produced by farmers who have adopted cross-bred cows (test) and those who have not adopted (Control) in the … were greater among test compared with control farmers in both study sites. Physical factors such as land, labour, oxen and … farmers living in regions with greater comparative advantage for grain production (Ada). Physical factors such as grazing area …