THOUGH MoST Western companies know that the business world has changed dramatically in the past 15 years, they still don't realize that its center of gravity has pretty much shifted to emerging markets. China, India, Brazil, Russia, and Mexico are all likely to be among the world's 12 largest economies by 2030, and any company that wants to remain a market leader will have to focus on consumers there. Chief executives have no choice but to start investing in the infrastructure, processes, and people needed to develop products in emerging markets