The first in-depth user research study on the usage of the "Location" field within Twitter profiles has just been published by the Palo Alto Research Center (PARC). With a sample size of 32 million English language tweets in hand, PARC summer intern Brent Hecht selected a group of 10,000 active users to study. Remarkably, he found that 34% of Twitter users do not provide a valid geographic location on their Twitter user profiles.
