Immigrants, and their source populations, inferred by population assignment test.

δ1 is the difference in log likelihood between the most likely source population and the second most likely source population. δ2 is the difference in log likelihood between the most likely source population and home population when the home population was not the second most likely source population.*Two potential source populations (δ values between the most likely and the second most likely are smaller than 1.0, while δ values between the second most likely source population and home population are greater than 1.0).