Measurements of economic growth often fall short for developing countries, particularly in sub-Saharan Africa, and are rarely calculated at all for cities throughout the world. In a new working paper, three Brown University economists suggest a way to improve GDP estimates for such areas by using images of nighttime lights as seen from outer space.
http://www.redorbit.com/news/space/1748525/measuring_gdp_growth_from_outer_space/index.html?source=r_space
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