Yale Study: Twice as Many Undocumented Immigrants as Previously Thought in U.S.

A new Yale study has concluded that the population of undocumented immigrants in the U.S. is close to double the generally accepted estimate.

The population of undocumented immigrants is widely thought to be around 11.3 million. But the study, which was conducted by three Yale-affiliated researchers, indicates that the total may be more than 22 million. Even the authors were surprised by their findings.

“Our original idea was just to do a sanity check on the existing number,” said one of the study’s authors, Edward Kaplan, a professor of operations research at the Yale School of Management. “Instead of a number which was smaller, we got a number that was 50 percent higher. That caused us to scratch our heads.”

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