Specialization and Diversification in Agricultural Transformation: The Case of West Punjab, 1903–92
实证研究作物专业化和多样化在农业转型中的作用，分析土地用途在作物和地区间的重新分配如何影响总土地生产率，并以西旁遮普这一农业商业化历史悠久的地区为例。
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.