文章基本信息

标题：Shedding Light on the Global Distribution of Economic Activity
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作者：Tilottama Ghosh ; Rebecca L. Powell ; Christopher D. Elvidge 等
期刊名称：The Open Geography Journal
电子版ISSN：1874-9232
出版年度：2010
卷号：3
页码：147-160
DOI：10.2174/1874923201003010147
出版社：Bentham open
摘要：
Collection of data on economic variables, especially sub-national income levels, is problematic, due to various shortcomings in the data collection process. Additionally, the informal economy is often excluded from official statistics. Nighttime lights satellite imagery and the LandScan population grid provide an alternative means for measuring economic activity. We have developed a model for creating a disaggregated map of estimated total (formal plus informal) economic activity for countries and states of the world. Regression models were developed to calibrate the sum of lights to official measures of economic activity at the sub-national level for China, India, Mexico, and the United States and at the national level for other countries of the world, and subsequently unique coefficients were derived. Multiplying the unique coefficients with the sum of lights provided estimates of total economic activity, which were spatially distributed to generate a spatially disaggregated 1 km² map of total economic activity.