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" To understand why the problem confounds policymakers, it is helpful to compare the world’s two largest economies. The United States is a liberal democracy with a market-based economy, in which the factors of production are privately owned. China, by contrast, is governed by a political class that holds democracy in contempt. Its economy – despite decades of pro-market reforms – continues to be defined by heavy state intervention.
But despite their radically different political and economic systems, the two countries have roughly the same level of income inequality. Each country’s Gini coefficient – the most commonly used measure of income equality – is roughly 0.47.
In one important way, however, their situations are very different. In the US, inequality is rapidly worsening. In 1978, the top 1% of the US population was ten times richer than the rest of the country. Today, the average income of the top 1% is roughly 30 times that of the average person in the remaining 99%. During the same period, inequality in China has been declining."
The Inequality Puzzle