高速互联网对儿童早期发展有害吗？来自一项全国性项目的证据
Is high-speed internet detrimental for early childhood development? Evidence from a countrywide program
Journal of Development Economics · 2026 · [{"name": "Karina Colombo", "affiliation": ["European University Institute"]}, {"name": "Elisa Failache", "affiliation": ["Universitat Autònoma de Barcelona"]}]
中文摘要
我们利用光纤入户推广过程中的跨队列和地理差异，估计高速互联网对儿童早期发展的影响。基于终身累积光纤接触程度的变异，并结合调查数据与行政数据，我们估计其对经验证筛查测试所测量的认知与非认知结果的影响。研究表明，终身光纤接触程度每增加10个百分点，会使沟通、问题解决和社交能力方面的发展得分下降相当于一个标准差的6%至17%。异质性效应分析显示，负面影响对父母受教育程度更高的儿童更大。
Abstract
We estimate the effects of high-speed internet in early childhood development exploiting cross-cohort and geographic differences in the introduction of fiber-optic-to-the-home. Using variation in lifetime cumulative exposure to fiber optic and combining survey and administrative data, we estimate effects on cognitive and non-cognitive outcomes measured by validated screening tests. We show that an increase in 10 percentage points in lifetime exposure to fiber optic decreases development scores between 6% and 17% of a standard deviation in communication, problem solving and social skills. An analysis of heterogeneous effects shows that the negative impact is larger for children with more educated parents.
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