China's economy is becoming more like America’s — and not in a good way

Business Insider

Published Jun 06, 2017 08:16AM ET

Updated Jun 06, 2017 09:16AM ET

China’s three-decade economic boom, marked by gravity-defying double-digit growth rates, has been accompanied by a sharp increase in income inequality, according to a new study from French economist Thomas Piketty.

"China’s inequality levels used to be close to Nordic countries and are now approaching US levels," writes Piketty, a professor at the University of California at Berkeley, alongside two co-authors in a new paper published by the National Bureau of Economic Research.

The authors compile "national accounts, survey, wealth and fiscal data (including recently released tax data on high-income taxpayers) in order to provide consistent series on the accumulation and distribution of income and wealth in China over the 1978-2015 period," the paper says.

That’s no small feat in a country where most economists don’t even trust more prominent economic indicators like gross domestic product. Inequality data are generally harder to come by, and Piketty stresses his efforts are preliminary.

Still, the findings are startling:

"We provide sharp upward revision of official inequality estimates," says Piketty. "The top 10% income share rose from 27% to 41% of national income between 1978 and 2015, while the bottom 50% share dropped from 27% to 15%."

They add: "Regarding wealth inequality, we have the same basic finding as for income inequality: wealth inequality used to be lower in China than everywhere else, and it is now intermediate between Europe and the USA."