This is mainly due to the correlation of higher carb intake with poverty, but it occurs even within smaller samples of countries at similar income levels. (perfecthealthdiet.com)
They could move anywhere they wanted to, but instead set up neighborhoods in suburbs that are almost exclusively black families from similar income levels. (religion.blogs.cnn.com)
When comparing homeowners with similar income levels in Los Angeles, the Chinese - American homeownership rate is 20 percent higher than whites; in San Francisco, 23 percent higher; and in New York, 18 percent greater. (realtormag.realtor.org)