This trend was noticed in the most recent census. Home DNA tests sold by the likes of Ancestry and 23andme are a contributing factor.
“We find that people who have taken a [mail in ancestry test] are not only more likely to self-identify as multiracial, they are particularly likely to select three or more races,” Johfre said. These differences were most pronounced for middle-age adults, which means the U.S. multiracial population would be growing because of more than just new births, the researchers noted.
“We find that people who have taken a [mail in ancestry test] are not only more likely to self-identify as multiracial, they are particularly likely to select three or more races,” Johfre said. These differences were most pronounced for middle-age adults, which means the U.S. multiracial population would be growing because of more than just new births, the researchers noted.
https://news.stanford.edu/2021/05/17/ancestry-tests-affect-r...