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Improving learning by improving vision: evidence from two randomized controlled trials of providing vision care in China

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  • Xiaochen Ma
  • Huan Wang
  • Yaojiang Shi
  • Sean Sylvia
  • Lei Wang
  • Yiwei Qian
  • Scott Rozelle

Abstract

This paper examines the external validity of health intervention by comparing the impacts of providing free eyeglasses on the educational performance of nearsighted children in two settings: rural public schools in Western China and urban private migrant schools in Eastern China. The intervention significantly improves educational outcomes by 0.14 standard deviations in math in rural public schools but not in private migrant schools. The difference in measured impacts is due in part to lower quality schooling in migrant schools in Eastern China. Our findings show that only when school is providing a quality education, health interventions might increase student learnings.

Suggested Citation

  • Xiaochen Ma & Huan Wang & Yaojiang Shi & Sean Sylvia & Lei Wang & Yiwei Qian & Scott Rozelle, 2021. "Improving learning by improving vision: evidence from two randomized controlled trials of providing vision care in China," Journal of Development Effectiveness, Taylor & Francis Journals, vol. 13(1), pages 1-26, January.
    • Handle: RePEc:taf:jdevef:v:13:y:2021:i:1:p:1-26
    DOI: 10.1080/19439342.2021.1876139
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    Cited by:

    1. Juerong Huang & Hongjing Dang & Yan Cai & Juan Liu & Qihui Chen, 2022. "Myopia and Depression among Middle School Students in China—Is There a Mediating Role for Wearing Eyeglasses?," IJERPH, MDPI, vol. 19(20), pages 1-18, October.
    2. Kang Du & Huan Wang & Yue Ma & Hongyu Guan & Scott Rozelle, 2022. "Effect of Eyeglasses on Student Academic Performance: What Matters? Evidence from a Randomized Controlled Trial in China," IJERPH, MDPI, vol. 19(17), pages 1-18, September.

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