There’s a daunting problem with data on foreign direct investment, vital statistics for evaluating countries’ bilateral relationships and global reach: The use of intermediary countries with business-friendly tax and legal regimes makes it hard to understand where much of the investment comes from. An economist at the United Nations Conference on Trade and Development has, however, come up with a way to get past this obstacle which completely changes how the data look for some big economies, such as Russia and China.

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