原文传递
From Guesstimates to GPStimates : Land Area Measurement and Implications for Agricultural Analysis
| 题名： | From Guesstimates to GPStimates : Land Area Measurement and Implications for Agricultural Analysis |
| 责任者： | Carletto, Calogero<=>Gourlay, Sydney<=>Winters, Paul |
| 关键词： | Private Sector Development；E-Business；Rural Development Knowledge and Information Systems；Roads and Highways；Science Education；Economic Theory and Research；Rural Development；Education；Macroeconomics and Economic Growth；Transport |
| 学科分类： | 交通运输规划与管理 |
| 摘要： | Land area measurement is a fundamental component of agricultural statistics and analysis. Yet, commonly employed self-reported land area measures used in most analysis are not only potentially measured with error, but these errors may be correlated with agricultural outcomes. Measures employing Global Positioning Systems, on the other hand, while not perfect especially on smaller plots, are likely to provide more precise measures and errors less correlated with agricultural outcomes. This paper uses data from four African countries to compare the use of self-reported and Global Positioning Systems land measures to (1) examine the differences between the measures, (2) identify the sources of the differences, and (3) assess the implications of the different measures on agricultural analysis focusing on the inverse productivity relationship. The results indicate that self-reported land areas systematically differ from Global Positioning Systems land measures and that this difference leads to potentially biased estimates of the relationship between land and productivity. |
| 出版机构： | World Bank |
| 报告类型： | 咨询报告 |
| 详细地址： | http://documents.worldbank.org/curated/en/2013/07/18055670/guesstimates-gpstimates-land-area-measurement-implications-agricultural-analysis |
| 资源类型： | 科技（咨询、行业）报告 |
| 初始创建时间： | 2013-07 |
| 最新修改时间： | 2017-12-13T12:47:02Z |
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