The Average and Heterogeneous Effects of Transportation Investments: Evidence from Sub-Saharan Africa 1960-2010
In: NBER Working Paper No. w27670
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In: NBER Working Paper No. w27670
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Working paper
In: Economic history of developing regions, Band 34, Heft 2, S. 156-208
ISSN: 2078-0397
In: Journal of development economics, Band 111, S. 212-223
ISSN: 0304-3878
In: Journal of development economics, Band 111, S. 212-223
ISSN: 0304-3878
World Affairs Online
In: Journal of development economics, Band 124, S. 60-82
ISSN: 0304-3878
In: Journal of development economics, Band 124, S. 60-82
ISSN: 0304-3878
World Affairs Online
In: World Bank Policy Research Working Paper No. 6925
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Working paper
In: American economic review, Band 101, Heft 3, S. 194-199
ISSN: 1944-7981
The quantity of human-generated light visible from outer space reflects variation in both population density and income per capita. In this paper we explore the usefulness of the change in visible light as a measure of GDP growth. We discuss the data, and then present a statistical framework that uses lights growth to augment existing income growth measures, assuming that measurement errors in the two series are uncorrelated. For some countries with very poor income measurement, we significantly revise estimates of growth. Our technique also produces growth estimates for cities or regions where no other data are available.
In: American economic review, Band 113, Heft 4, S. 1083-1111
ISSN: 1944-7981
We develop a methodology to estimate robust city-level vehicular speed indices, exactly decomposable into uncongested speed and congestion. We apply it to 180 Indian cities using 57 million simulated trips measured by a web mapping service. We verify the reliability of our simulated trips using a number of alternative data sources, including data on actual trips. We find wide variation in speed across cities that is driven more by differences in uncongested speed than congestion. Denser and more populated cities are slower, only in part because of congestion. Urban economic development is correlated with faster speed despite worse congestion. (JEL O15, O18, R23, R41)
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Working paper
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Working paper
In: CEPR Discussion Paper No. DP13291
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Working paper
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Working paper
In: American economic review, Band 102, Heft 2, S. 994-1028
ISSN: 1944-7981
We develop a statistical framework to use satellite data on night lights to augment official income growth measures. For countries with poor national income accounts, the optimal estimate of growth is a composite with roughly equal weights on conventionally measured growth and growth predicted from lights. Our estimates differ from official data by up to three percentage points annually. Using lights, empirical analyses of growth need no longer use countries as the unit of analysis; we can measure growth for sub- and supranational regions. We show, for example, that coastal areas in sub-Saharan Africa are growing slower than the hinterland. (JEL E01, E23, O11, 047, 057)
In: NBER Working Paper No. w15199
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