1. Detecting the Boundaries of Urban Areas in India: A Dataset for Pixel-Based Image Classification in Google Earth Engine, (joint with Ran Goldblatt, Gordon Hanson, and Amit Khandelwal), Remote Sensing, 2016, 8(8), 634. (PDF)
Abstract: What are the welfare implications of placing restrictions on internal migration? In theory, the answer is ambiguous, given externalities in locational choices. This paper empirically studies presumably the largest intervention on internal migration in human history--the Hukou system in China. Using a dynamic spatial equilibrium framework and restricted-use census data, we find that completely removing Hukou-related migration restrictions between 2000 and 2010 would have resulted in an approximately 15%-30% increase in GDP and welfare. The presence of externalities results in a conflict between national interest and local interest: while it would be beneficial to remove all the Hukou restrictions from the national perspective, natives in the most desirable cities would suffer losses. This implies that further relaxations of internal migration restrictions must be accompanied by measures to compensate the natives.
3. The Economics of Speed: The Electrification of the Streetcar System and the Decline of Mom-and-Pop Stores in Boston, 1885-1905, R & R at American Economic Journal: Applied Economics. (PDF)
RESEARCH IN PROGRESS:
Disinvestment and Central City Decline, (joint with Ingrid Ellen, Daniel Hartley, and Jeffrey Lin).
By Land and Sea: Transportation Innovation and Real Estate Values in New York City, 1865 – 1903, (joint with Jason Barr and Fred Smith).
Was Housing Always this Expensive? Estimating the Housing Elasticity of Supply for Manhattan from 1870 to 2017, (joint with Jason Barr). (preliminary draft)
The Impact of a Transportation Infrastructure Upgrade on Ethnic Enclaves: Evidence from Late-Nineteenth Century Boston. (preliminary draft)
Fatal Disease and Firm Productivity: Evidence from the 2003 SARS Epidemic, (joint with Shilin Zheng, Jinyong Zhan, and Zhenting Sun).