Early Childhood Human Capital and Development
研究早期儿童投资能否解释跨国收入差异，发现难民在6岁前到达美国的成人结果与年龄无关，表明父母而非国家环境对早期发展更重要。
A growing literature stresses the importance of early childhood human capital. I ask whether variation in early childhood investments can help explain cross-country income differences. I provide new empirical evidence: the adult outcomes of refugees are independent of age at arrival to the United States up to age six, despite dramatic improvements in income and environment upon arrival. A standard model is consistent with this finding if parents but not country are important for early childhood development. This finding limits the mechanisms for generating cross-country early childhood human capital differences. I also provide suggestive evidence on parental inputs.