More than one-third of Italy’s richest people inherited their fortunes, compared with just 29 percent in the U.S. and 2 percent in China, according to a 2014 study of the world’s billionaires by the Peterson Institute for International Economics. Germany has the highest share of inheritor-billionaires among developed economies, 65 percent. Overall, heirs and heiresses make up about half of Western Europe’s billionaires.
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