As incomes rise, categories reach a takeoff point where demand accelerates by 3-5 times. At higher levels of income, markets become saturated and growth slows.
此外，选择在何处开展业务的时机也是非常重要。消费产品的需求一般都会呈现S型曲线。随着收入上升，当需求增速提升了3~5倍后产品品类开始增加。随着收入达到更高水平，市场变得饱和，增长也因此放缓。