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  "notes": "This slide serves as a critical review of the existing evidence base in education economics.",
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      "text": "Unfortunately, less than 30 percent of studies report cost-effectiveness, which may be an increase from a few years ago.",
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      "text": "The weaknesses of this evidence base are the same weaknesses of economics of education research throughout low- and middle-income countries. The first is the duration of impacts. The vast majority of interventions measure outcomes within twelve months...",
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      "text": "18 Even if one had those data, comparing costs across settings entails many of the same challenges that comparing effect sizes entails (Evans and Popova, 2016a).",
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