Company suggest that the purchasing power of this rising middle class in emerging markets may rise to $20 trillion over the next decade – twice the current level of consumption in the United States. The four biggest emerging economies – Brazil, Russia, India, and China (the BRICs) – are large producers and consumers of goods and services, and will also be important in shaping the pace, direction, and sustainability of global economic growth.
而麦肯锡公司则预计这一不断崛起的阶级将在未来十年内实现20万亿美元/年的购买力——这是美国目前全国购买力水平的两倍。四个最大的新兴经济体——巴西、俄罗斯，印度和中国（金砖四国）——本身既是大生产商，同时也是商品和服务的大宗消费者，并将在很大程度上左右全球经济发展的速度，方向和可持续性。