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Face Masks Considerably Reduce Covid-19 Cases in Germany - A Synthetic Control Method Approach

Author

Listed:
  • Timo Mitze
  • Reinhold Kosfeld
  • Johannes Rode
  • Klaus Wälde

Abstract

We use the synthetic control method to analyze the effect of face masks on the spread of Covid‐19 in Germany. Our identification approach exploits regional variation in the point in time when wearing of face masks became mandatory in public transport and sales shops. Depending on the region we consider, we find that face masks reduced the number of newly registered SARS‐CoV‐2 infections between 15% and 75% over a period of 20 days after their mandatory introduction. Assessing the credibility of the various estimates, we conclude that face masks reduce the daily growth rate of reported infections by around 47%.

Suggested Citation

  • Timo Mitze & Reinhold Kosfeld & Johannes Rode & Klaus Wälde, 2020. "Face Masks Considerably Reduce Covid-19 Cases in Germany - A Synthetic Control Method Approach," CESifo Working Paper Series 8479, CESifo.
    • Handle: RePEc:ces:ceswps:_8479
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    References listed on IDEAS

    as
    1. Jean Roch Donsimoni & René Glawion & Bodo Plachter & Constantin Weiser & Klaus Wälde, 2020. "Should Contact Bans Be Lifted in Germany? A Quantitative Prediction of Its Effects," CESifo Working Paper Series 8242, CESifo.
    2. Donsimoni Jean Roch & Glawion René & Plachter Bodo & Wälde Klaus, 2020. "Projecting the spread of COVID-19 for Germany," German Economic Review, De Gruyter, vol. 21(2), pages 181-216, June.
    3. Mitze, Timo & Kosfeld, Reinhold & Rode, Johannes & Wälde, Klaus, 2020. "Face masks considerably reduce COVID-19 cases in Germany," Publications of Darmstadt Technical University, Institute for Business Studies (BWL) 124130, Darmstadt Technical University, Department of Business Administration, Economics and Law, Institute for Business Studies (BWL).
    4. Mitze, Timo & Kosfeld, Reinhold & Rode, Johannes & Wälde, Klaus, 2020. "Face masks considerably reduce COVID-19 cases in Germany," Publications of Darmstadt Technical University, Institute for Business Studies (BWL) 124587, Darmstadt Technical University, Department of Business Administration, Economics and Law, Institute for Business Studies (BWL).
    5. Mitze, Timo & Kosfeld, Reinhold & Rode, Johannes & Wälde, Klaus, 2020. "Face Masks Considerably Reduce COVID-19 Cases in Germany: A Synthetic Control Method Approach," IZA Discussion Papers 13319, Institute of Labor Economics (IZA).
    6. Alberto Abadie & Javier Gardeazabal, 2003. "The Economic Costs of Conflict: A Case Study of the Basque Country," American Economic Review, American Economic Association, vol. 93(1), pages 113-132, March.
    7. Friedson, Andrew I. & McNichols, Drew & Sabia, Joseph J. & Dave, Dhaval M., 2020. "Did California's Shelter-In-Place Order Work? Early Coronavirus-Related Public Health Effects," IZA Discussion Papers 13160, Institute of Labor Economics (IZA).
    8. Sebastian Galiani & Brian Quistorff, 2017. "The synth runner package: Utilities to automate synthetic control estimation using synth," Stata Journal, StataCorp LP, vol. 17(4), pages 834-849, December.
    9. Noémi Kreif & Richard Grieve & Dominik Hangartner & Alex James Turner & Silviya Nikolova & Matt Sutton, 2016. "Examination of the Synthetic Control Method for Evaluating Health Policies with Multiple Treated Units," Health Economics, John Wiley & Sons, Ltd., vol. 25(12), pages 1514-1528, December.
    10. Jean Roch Donsimoni & René Glawion & Bodo Plachter & Constantin Weiser & Klaus Wälde, 2020. "Should contact bans be lifted in Germany?," Working Papers 2008, Gutenberg School of Management and Economics, Johannes Gutenberg-Universität Mainz.
    11. Hu, Luojia & Kaestner, Robert & Mazumder, Bhashkar & Miller, Sarah & Wong, Ashley, 2018. "The effect of the affordable care act Medicaid expansions on financial wellbeing," Journal of Public Economics, Elsevier, vol. 163(C), pages 99-112.
    12. Abadie, Alberto & Diamond, Alexis & Hainmueller, Jens, 2010. "Synthetic Control Methods for Comparative Case Studies: Estimating the Effect of California’s Tobacco Control Program," Journal of the American Statistical Association, American Statistical Association, vol. 105(490), pages 493-505.
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    More about this item

    Keywords

    Covid-19; public health measures; face masks; synthetic control method;
    All these keywords.

    JEL classification:

    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health
    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models

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