From the Article:
As the money in soccer -- called football in Europe -- has soared with its global popularity and the signing of lucrative television deals, team owners have become more secretive about their finances, and compensation packages for players have become more complex, creating more opportunities for avoiding taxes, said Alex Cobham, a research fellow who studies taxation and inequality at the Center for Global Development in London. Tax avoidance in the sport has probably reached billions of euros, he said.
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