China's medieval Tang dynasty had a surprising level of social mobility‚ new study finds
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China's medieval Tang dynasty had a surprising level of social mobility‚ new study finds

In studying social mobility in today's industrialized nations‚ researchers typically rely on data from the World Economic Forum or‚ in the United States‚ the General Social Survey. But examining the same phenomena from past centuries is a more daunting task because relevant statistics are harder to come by.