Given that low-income economies typically have little fixed capital (computers, factories, infrastructure) and human capital (education and training) per worker, they tend to have higher potential returns to capital investment. That means they can grow more rapidly than wealthier economies, until their per capita income catches up.
低收入国家往往人均固定资本（计算机、工厂、基础设施）和人力资本（教育和培训）极低，因此资本投资回报潜力较高。这意味着它们可以以比富裕国家更快的速度增长，直到人均收入实现赶超。