Dynamic Impacts of School-Based Internet Access on Student Learning: Evidence from Peruvian Public Primary Schools
American Economic Journal: Economic Policy · 2023 · Leah K. Lakdawala、Eduardo Nakasone、Kevin Kho
中文摘要
我们利用秘鲁公立小学面板数据中超过200万条学生观测值，考察了学校互联网接入对二年级学生考试成绩的影响。借助一项全国性项目推广所导致的互联网接入时间差异，我们识别了安装后长达6年以上对不同届二年级学生队列的影响。我们发现短期影响为正但较为温和，但重要的是，这些效应在后续队列中逐渐增大。事实上，仅凭短期估计将会得出不同的结论。这些动态变化凸显了延长评估窗口的价值，以便教育技术的效益得以充分显现。（JEL I21, I26, I28, O15）
Abstract
We investigate the impacts of school-based internet access on second graders’ test scores, using over 2 million student observations from a panel of Peruvian public primary schools. We identify effects up to 6+ years after installation on different cohorts of second-grade students, exploiting variation in the timing of internet access induced by the rollout of a national program. We find positive but modest short-run impacts, but importantly, these effects grow for subsequent cohorts. Indeed, short-run estimates alone would have led to different conclusions. These dynamics underscore the value of extended evaluation windows to allow benefits of educational technology to materialize. (JEL I21, I26, I28, O15)