Last year one of my students* was trying to explain why immigrants struggle in the job market. His regressions weren't working, so he switched things round a bit.
Using 2006 Census data, he found that people in Newfoundland are 30 percentage points less likely to be immigrants than people in Ontario. People with PhDs are 21 percentage points more likely to be immigrants than people with a high school education. And people who are divorced are 9 percentage points less likely to be immigrants than people who are married.
He was crushed when I said "You can't use any of this in your paper. It doesn't make sense to have immigrant status as your dependent variable."