Econometric methods for measuring natural resource management impacts: theoretical issues and illustrations from Uganda.
Econometric methods for measuring natural resource management impacts: theoretical issues and illustrations from Uganda.
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DOI：
10.1079/9780851998282.0127
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
J. Pender;B. Shiferaw;H. Freeman;S. Swinton
中科院分区：
文献类型：
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作者：
J. Pender;B. Shiferaw;H. Freeman;S. Swinton
本章着重于评估农民的自然资源管理（NRM）的做法（和其他决策影响NRM研究）的利益，如生产力的结果的影响。本章的第一部分讨论了一般的NRM影响评估的计量经济学方法，它们的优点和缺点，以及必须解决的问题类型。其次是探索一些关键的计量经济学问题，更详细地使用简单的数学符号。然后提出了一个例子，使用计量经济学方法来评估自然资源管理和其他因素对乌干达作物生产的影响。在前面的章节中讨论的许多方法都被纳入到研究中，包括多重共线性检验，排除限制，相关性，以及普通线性最小二乘回归（OLS）与工具变量（IV）估计一致性的Hausman检验。结果表明，其他因素对乌干达作物生产价值的影响大于土地管理做法和大多数土地投资，香蕉生产投资除外。其他特别重要的因素包括使用的劳动力数量、获得农业推广和培训的机会以及家庭的收入战略。
This chapter focuses on the assessment of the impacts of farmers' natural resource management (NRM) practices (and other decisions affected by NRM research) on outcomes of interest such as productivity. The first part of the chapter discusses econometric approaches to NRM impact assessment in general, their merits and drawbacks, and the types of problems that must be addressed. This is followed by an exploration of some of the key econometric issues in more detail using simple mathematical notation. An example is then presented of the use of econometric methods to assess the impacts of NRM and other factors on crop production in Uganda. Many of the approaches discussed in the preceding section are incorporated into the study, including test of multicollinearity, exclusion restrictions, relevance, and the Hausman test of consistency of ordinary linear least squares regression (OLS) vs. instrumental variables (IV) estimation. The results imply that other factors are having more impact on the value of crop production in Uganda than land management practices and most land investments, except investment in banana production. Other particularly important factors include the amount of labour used, access to agricultural extension and training, and the income strategy of the household.