Diversification in Agricultural Production: A Dynamic Model of Optimal Cropping to Manage Soil Erosion
构建了一个土壤侵蚀的动态经济模型，分析农民如何通过投入强度和作物选择控制土壤流失，发现短期最优是单一种植，长期稳态则需混合种植，并评估了不同政策对土壤存量的影响。
Abstract A dynamic economic model of soil erosion is presented where the intensity of use of inputs and the choice of crops allow the farmer to control soil losses. The results show that it is predominately optimal to approach the singular‐path/steady‐state equilibrium most rapidly by the cultivation of a single crop. At the steady state, however, a mix of crops is cultivated. The promotion of erosion control practices on only high‐erosion crops may reduce the long‐run soil stock, whereas a tax on the land cultivated with a particular crop is shown to be effective in increasing the long‐run soil stock.