Simple Model of Resource Degradation and Agricultural Productivity in a Subsistence Economy
Simple Model of Resource Degradation and Agricultural Productivity in a Subsistence Economy
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自给经济中资源退化和农业生产力的简单模型
DOI：
10.1111/j.1467-9361.2004.00224.x
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Kevin Sylwester
中科院分区：
文献类型：
--
作者：
Kevin Sylwester
资源退化给许多发展中国家带来了问题。在本文提出的模型中，当前的农业生产降低了未来的土地生产率。由于代理人必须生产以满足当前的生存需要，这可能导致陷入贫困陷阱，土地质量随着时间的推移不断退化。然而，该模型表明，并非所有自给农都落入这一陷阱，尽管在实践中可能难以区分属于每种情况的农民。该模型还表明，为什么政府计划，如收入转移，贷款，价格控制可能会对经济结果不同的影响，这取决于农民的具体情况。
Resource degradation poses problems in many developing countries. In the model presented in the paper, current agricultural production lowers future land productivity. Since agents must produce to meet current subsistence needs, this can lead to a poverty trap in which land quality is continuously degraded over time. However, the model shows that not all subsistence farmers fall into this trap, although it might be difficult in practice to distinguish among those belonging to each case. The model also demonstrates why government programs such as income transfers, loans, and price controls might have differing effects upon economic outcomes depending upon the specific circumstances of farmers.