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8
COVID-19 Time-varying Reproduction Numbers Worldwide: An Em..
NBER working paper series, no. w28629
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11
Voluntary and mandatory social distancing
evidence on Covid-19 exposure rates from Chinese provinces ...
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13
A Counterfactual Economic Analysis of Covid-19 Using a Thre..
NBER working paper series, no. w27855
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15
Voluntary and Mandatory Social Distancing: Evidence on COVI..
NBER working paper series, no. w27039