[toyg]

FTFA:

> Some argue that more liberal candidates are more popular in urban than in the rural precincts. To verify this hypothesis, we drew geographically random samples of precincts and computed partial correlations to filter out the population density factor. We will demonstrate in this paper that this factor has no impact on our conclusions.

[leereeves]

Yes, I saw that. The authors ruled out one possible explanation (urban vs rural).

Perhaps it's due to gerrymandered districts, republican vs democratic districts, large farm districts vs small towns, small towns vs large cities, or some other factor we can't think of in a few minutes.

The authors should rule out a lot more possible explanations before alleging fraud.