Birth weight and school performance
利用挪威近二十年的行政数据，研究发现出生体重越高，学业表现越好，尤其在数学上，且这一关系在控制家庭因素后依然稳健，对理解早期人力资本形成有参考价值。
This study investigates the long-term association between birth weight and school performance in Norway, with a focus on how this relationship has evolved alongside demographic changes. We contribute to the literature by examining this link in a contemporary context using nearly two decades of administrative data. Our findings indicate that higher birth weight is consistently associated with better school performance, particularly in mathematics. This association remains robust across multiple model specifications, including those that account for unobserved family heterogeneity. We also find a slightly stronger association among girls, though the gender interaction is small and not robust in the twin design. Overall, the results underscore birth weight as a stable predictor of academic achievement and highlight its relevance for understanding early-life determinants of human capital development.