In this article, the role of crop specialization and diversification in agricultural transformation is investigated empirically. Changes in aggregate land productivity are associated structurally with inter‐crop and inter‐district reallocation of land use. Results from a region with the oldest history of agricultural commercialization in developing countries show that cropping patterns of subsistence agriculture changed substantially, with rising concentration of crop acreage in districts with higher and growing productivity. Rapid specialization in crop production was observed at the district level recently, after a phase with sporadic specialization. These changes reflected comparative advantage and contributed to the improvement in aggregate land productivity.
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Takashi Kurosaki (2003) studied this question.
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