Also, the tweets were anonymous, so it was not possible to gather demographic information about the individuals who wrote them. (sciencedaily.com)
We use IP addresses to analyze trends, administer the site, track user's movement, and gather broad demographic information for aggregate use. (cshl.edu)
It's difficult to gather data on voucher students across the states because many programs do not collect demographic information on students. (ncpecoalition.org)