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A Few Good Masks : Evidence from Mask Manufacturing in Rwanda during the COVID-19 Pandemic

Author

Listed:
  • Byrne,Kieran Thomas
  • Kondylis,Florence
  • Loeser,John Ashton
  • Mukama,Denis

Abstract

Did increases in mask supply slow the spread of COVID-19 Rwanda licensed and incentivized textilemanufacturers to produce high-quality masks at the start of the COVID-19 pandemic. This paper exploits spatial variationin exposure to mask manufacturing through textile trade networks within an event-study design using receipt-leveltax data. Licensing domestic mask manufacturers conservatively reduced mask prices by 8.8% and reducedmonthly growth in COVID-19 infections (proxied by demand for anti-fever medicine) by 12%. The dynamics of the resultssuggest that increased mask quality explains reduced infections, in a context where there was strict enforcementof mask mandates and informal markets for masks.

Suggested Citation

  • Byrne,Kieran Thomas & Kondylis,Florence & Loeser,John Ashton & Mukama,Denis, 2022. "A Few Good Masks : Evidence from Mask Manufacturing in Rwanda during the COVID-19 Pandemic," Policy Research Working Paper Series 9993, The World Bank.
  • Handle: RePEc:wbk:wbrwps:9993
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    References listed on IDEAS

    as
    1. Dave Donaldson, 2018. "Railroads of the Raj: Estimating the Impact of Transportation Infrastructure," American Economic Review, American Economic Association, vol. 108(4-5), pages 899-934, April.
    2. Clément de Chaisemartin & Xavier D'Haultfœuille, 2020. "Two-Way Fixed Effects Estimators with Heterogeneous Treatment Effects," American Economic Review, American Economic Association, vol. 110(9), pages 2964-2996, September.
    3. James Berry & Greg Fischer & Raymond Guiteras, 2020. "Eliciting and Utilizing Willingness to Pay: Evidence from Field Trials in Northern Ghana," Journal of Political Economy, University of Chicago Press, vol. 128(4), pages 1436-1473.
    4. Dina Pomeranz, 2015. "No Taxation without Information: Deterrence and Self-Enforcement in the Value Added Tax," American Economic Review, American Economic Association, vol. 105(8), pages 2539-2569, August.
    5. Esther Duflo, 2001. "Schooling and Labor Market Consequences of School Construction in Indonesia: Evidence from an Unusual Policy Experiment," American Economic Review, American Economic Association, vol. 91(4), pages 795-813, September.
    6. Timothy J. Bartik, 1991. "Who Benefits from State and Local Economic Development Policies?," Books from Upjohn Press, W.E. Upjohn Institute for Employment Research, number wbsle.
    7. Sant’Anna, Pedro H.C. & Zhao, Jun, 2020. "Doubly robust difference-in-differences estimators," Journal of Econometrics, Elsevier, vol. 219(1), pages 101-122.
    8. Hoyt Bleakley, 2010. "Malaria Eradication in the Americas: A Retrospective Analysis of Childhood Exposure," American Economic Journal: Applied Economics, American Economic Association, vol. 2(2), pages 1-45, April.
    9. Rodrigo Ad~ao & Michal Koles'ar & Eduardo Morales, 2018. "Shift-Share Designs: Theory and Inference," Papers 1806.07928, arXiv.org, revised Aug 2019.
    10. Jason Abaluck & Laura H Kwong & Ashley Styczynski & Md. Ashraful Haque & Alamgir Kabir & Ellen Bates-Jeffries & Emily Crawford & Jade Benjamin-Chung & Salim Benhachmi & Shabib Raihan & Shadman Rahman , 2021. "Normalizing Community Mask-Wearing: A Cluster Randomized Trial in Bangladesh," Cowles Foundation Discussion Papers 2284, Cowles Foundation for Research in Economics, Yale University.
    11. Brantly Callaway & Andrew Goodman-Bacon & Pedro H. C. Sant'Anna, 2021. "Difference-in-Differences with a Continuous Treatment," Papers 2107.02637, arXiv.org, revised Dec 2025.
    12. Paul Goldsmith-Pinkham & Isaac Sorkin & Henry Swift, 2020. "Bartik Instruments: What, When, Why, and How," American Economic Review, American Economic Association, vol. 110(8), pages 2586-2624, August.
    13. Edward Miguel & Michael Kremer, 2004. "Worms: Identifying Impacts on Education and Health in the Presence of Treatment Externalities," Econometrica, Econometric Society, vol. 72(1), pages 159-217, January.
    14. Rodrigo Adão & Michal Kolesár & Eduardo Morales, 2019. "Shift-Share Designs: Theory and Inference," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 134(4), pages 1949-2010.
    15. Wooldridge, Jeffrey M., 1999. "Distribution-free estimation of some nonlinear panel data models," Journal of Econometrics, Elsevier, vol. 90(1), pages 77-97, May.
    16. Hoyt Bleakley, 2007. "Disease and Development: Evidence from Hookworm Eradication in the American South," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 122(1), pages 73-117.
    17. Chernozhukov, Victor & Kasahara, Hiroyuki & Schrimpf, Paul, 2021. "Causal impact of masks, policies, behavior on early covid-19 pandemic in the U.S," Journal of Econometrics, Elsevier, vol. 220(1), pages 23-62.
    18. Conley, T. G., 1999. "GMM estimation with cross sectional dependence," Journal of Econometrics, Elsevier, vol. 92(1), pages 1-45, September.
    19. Ho, Daniel E. & Imai, Kosuke & King, Gary & Stuart, Elizabeth A., 2007. "Matching as Nonparametric Preprocessing for Reducing Model Dependence in Parametric Causal Inference," Political Analysis, Cambridge University Press, vol. 15(3), pages 199-236, July.
    Full references (including those not matched with items on IDEAS)

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