Recent bickering over who should require what to vote where have suggested that requiring a person bring some form of ID to the poll might help alleviate fraud. This makes important assumptions:
- Requiring ID's from voters will make a difference in the rate of fraudulent votes.
- The difference in the rate of fraudulence is significant enough to matter in elections.
My guess is that both make a difference, but I am only guessing, I don't have any statistics to back this up.