NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Long Wang

ShanghaiTech University
421 SEM, No.393 Middle Huaxia Road
Pudong district
Shanghai
China
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Institutional Affiliation: ShanghaiTech University

NBER Working Papers and Publications

March 2020Human Mobility Restrictions and the Spread of the Novel Coronavirus (2019-nCoV) in China
with Hanming Fang, Yang Yang: w26906
We quantify the causal impact of human mobility restrictions, particularly the lockdown of the city of Wuhan on January 23, 2020, on the containment and delay of the spread of the Novel Coronavirus (2019-nCoV). We employ a set of difference-in-differences (DID) estimations to disentangle the lockdown effect on human mobility reductions from other confounding effects including panic effect, virus effect, and the Spring Festival effect. We find that the lockdown of Wuhan reduced inflow into Wuhan by 76.64%, outflows from Wuhan by 56.35%, and within-Wuhan movements by 54.15%. We also estimate the dynamic effects of up to 22 lagged population inflows from Wuhan and other Hubei cities, the epicenter of the 2019-nCoV outbreak, on the destination cities' new infection cases. We find, using simula...
 
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