New index helps track countries' success in breeding new business.

From The Economist: How to find work for all these young hands? The answer may lie with entrepreneurs. High-growth start-ups are the best generators of new jobs (the Kauffman Foundation, an American outfit devoted to entrepreneurship, calculates that between 1980 and 2005 nearly all net job creation in America took place in firms that were less than five years old). They are also the firms most likely to raise productivity, a basis for economic growth. They create jobs that did not previously exist and solve problems that people assumed were part of the natural order of things.

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