The Census Has Revealed A More Multiracial U.S. One Reason? Cheaper DNA Tests

https://www.npr.org/2021/08/28/ [login to see] /2020-census-results-data-race-multiracial-dna-ancestry-test-mixed-biracial
As experts look at the changing numbers, three main factors have emerged as drivers of this boom.

A growing share of children in the U.S. have been born to parents who identify with racial groups that are different from one another.

For the 2020 count, the Census Bureau changed how it asked about race and how it categorized the answers. (If you wrote in a response that federal standards consider to be "Hispanic or Latino," for example, that answer was sorted into the "Some Other Race" category.)

And more people may be rethinking what they tell the government about their identities. Some demographers are wondering how much a relatively new trend may have contributed to that growth — the rise of at-home DNA ancestry testing.