But in that case, investment in education is unlikely to deliver much if the other conditions are missing. After all, though the typical country with ten years of schooling had a per capita income of $30,000 in 2010, per capita income in Albania, Armenia, and Sri Lanka, which have achieved that level of schooling, was less than $5,000.
面对上述情况，教育爱好者们往往提出教育是增长的必要而非充分条件。但如果真的如此，在缺少其他条件的情况下教育投资不太可能取得多大效果。毕竟，虽然满足10年学校教育的国家2010年一般人均收入为30,000美元，但达到同样教育水平的阿尔巴尼亚、亚美尼亚和斯里兰卡的人均收入还不到5，000美元。妨碍这些国家富裕起来不是教育而是其他因素。