Innovators gravitate to the regions where they feel they're best able to execute their ideas, writes INSEAD's Sami Mahroum. To prevent brain drain and encourage creative types to stay in their home countries, policymakers need to focus on providing non-portable resources, such as a low cost of doing business, or high-caliber infrastructure. "The challenge for governments is to improve those less mobile factors of innovation ... in order to attract, retain, and encourage free-flowing capital and the most creative citizens," Mahroum writes.

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