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Eyeglasses: CEA based on Reddy et al (2018)
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Costs
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Glasses, including delivery and vision exam$10.20Color Code
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Total cost$10.20From Reddy et al paper
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BenefitsFrom 2018 CEA
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Increase in daily income, %21.7%From other sources
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Plucking season duration (weeks)20Judgments
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Remainder of year (weeks)32Calculations
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Increase in annual income per worker0.0835
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Increases in household income0.0417
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Average household size4.7
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Per capita increase in ln(income)0.19
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Near vision impairment disability weight0.013
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Disability weight averted through glasses0.026
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Glasses lifespan (years)2
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Adjustments
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Internal validity adjustment70%
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External validity adjustment60%
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Proportion of productivity gain that flows through to income100%
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Cost effectiveness
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Units of increase in ln(income) for each dollar donated0.016
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Value assigned to increasing ln(income) by one unit for one person for one year
1.44
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DALYs averted per dollar0.003
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Value assigned to 1 YLD averted2.30
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Cost per DALY averted392.31
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Units of value from income benefits per $100,000 donated 2278.7
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Units of value from disability aversion per $100,000 donated 586.3
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Total units of value per $100,000 donated 2865.0
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Compared to GiveDirectly
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GiveDirectly total units of value per $100,000 donated344
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Total cost-effectiveness relative to GiveDirectly 8.33
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Cost-effectiveness relative to GD -- income benefits only6.62
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Cost-effectiveness relative to GD -- disability aversion benefits only1.70
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Contribution of each outcome to overall cost-effectiveness
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Percent of cost-effectiveness coming from income increases80%
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Percent of cost-effectiveness coming from disability aversion20%
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Note: This CEA was created in Oct 2018 and modified in Apr 2019 (original version here). Moral weights only were updated in February 2021
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