The infrastructure for the program makes it possible for an association to obtain several different demographic features about each voter record, such as vote history, age and homeowner status. (nar.realtor)
As well as the importance of demographic features of the jurors, attitudes towards rape were found to be the strongest predictor of high numbers of not guilty verdicts. (lawyer-monthly.com)
The constituencies don't necessarily share any other demographic features other than they happen to be marginals (which could be for any number of reasons) so the weighting can only be complete junk. (conservativehome.blogs.com)