Before revision: The spatial distribution of economic activity in the world The spatial distribution of the economic activity in the world was examined by mapping the artificial lights at night over 250,000 grid cells, the average area of each of which is 560 square kilometers.
After revision: In a pair of studies from Brown University by urban economist J. Vernon Henderson, with co-authors Adam Storeygard and David Weil, thefrom space spatial distribution of economic activity in the world The spatial distribution of the economic activity in the world was examined by mapping the artificial lights at night over 250,000 grid cells, the average area of each of which is 560 square kilometers.