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首页> 外文期刊>Journal of Development Economics >Retrospective vs. prospective analyses of school inputs: the case of flip charts in Kenya
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Retrospective vs. prospective analyses of school inputs: the case of flip charts in Kenya

机译:对学校投入的回顾性分析与前瞻性分析:肯尼亚的活动挂图案例

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摘要

This paper compares retrospective and prospective analyses of the effect of flip charts on test scores in rural Kenyan schools. Retrospective estimates suggest that flip charts raise test scores by up to 20% of a standard deviation. Yet prospective estimators based on a randomized trial provide no evidence that flip charts increase test scores. One interpretation is that the retrospective results suffered from omitted variable bias. If the direction of this bias were similar in other retrospective analyses of educational inputs in developing countries, the effects of inputs may be more modest than retrospective studies suggest. A difference-in-differences retrospective estimator seems to reduce bias, but it requires additional assumptions and is feasible for only some educational inputs.
机译:本文对肯尼亚农村学校活动挂图对考试成绩的影响进行了回顾性和前瞻性分析。回顾性估计表明,活动挂图可将测试分数提高多达标准偏差的20%。然而,基于随机试验的前瞻性估算者没有提供任何证据表明活动挂图会增加测试分数。一种解释是回顾性结果遭受了遗漏的变量偏差。如果在发展中国家对教育投入的其他回顾分析中这种偏向的方向相似,则投入的影响可能比回顾研究所建议的要适度。差异差异追溯估计量似乎可以减少偏差,但是它需要附加的假设,并且仅对某些教育投入可行。

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