NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Daniel Sturm

Department of Economics
London School of Economics
Houghton Street
London WC2A 2AE
United Kingdom
Tel: +44-20-7955 7522

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NBER Working Papers and Publications

September 2018The Making of the Modern Metropolis: Evidence from London
with Stephan Heblich, Stephen J. Redding: w25047
Modern metropolitan areas involve large concentrations of economic activity and the transport of millions of people each day between their residence and workplace. We use the revolution in transport technology from the invention of steam railways, newly-constructed spatially-disaggregated data for London from 1801-1921, and a quantitative urban model to provide evidence on the role of these commuting flows in supporting such concentrations of economic activity. Steam railways dramatically reduced travel times and permitted the first large-scale separation of workplace and residence. We show that our model is able to account for the observed changes in the organization of economic activity, both qualitatively and quantitatively. In counterfactuals, we find that removing the entire railway n...
July 2014The Economics of Density: Evidence from the Berlin Wall
with Gabriel M. Ahlfeldt, Stephen J. Redding, Nikolaus Wolf: w20354
This paper develops a quantitative model of internal city structure that features agglomeration and dispersion forces and an arbitrary number of heterogeneous city blocks. The model remains tractable and amenable to empirical analysis because of stochastic shocks to commuting decisions, which yield a gravity equation for commuting flows. To structurally estimate agglomeration and dispersion forces, we use data on thousands of city blocks in Berlin for 1936, 1986 and 2006 and exogenous variation from the city’s division and reunification. We estimate substantial and highly localized production and residential externalities. We show that the model with the estimated agglomeration parameters can account both qualitatively and quantitatively for the observed changes in city structure. We show ...

Published: Gabriel M. Ahlfeldt & Stephen J. Redding & Daniel M. Sturm & Nikolaus Wolf, 2015. "The Economics of Density: Evidence From the Berlin Wall," Econometrica, Econometric Society, vol. 83, pages 2127-2189, November. citation courtesy of

July 2005Political Competition and Economic Performance: Theory and Evidence from the United States
with Timothy Besley, Torsten Persson: w11484
One of the most cherished propositions in economics is that market competition by and large raises consumer welfare. But whether political competition has similarly virtuous consequences is far less discussed. This paper formulates a model to explain why political competition may enhance economic performance and uses the United States as a testing ground for the model's implications. It finds statistically robust evidence that political competition has quantitatively important effects on state income growth, state policies, and the quality of Governors.
 
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