Such information is usually collated using surveys, which are very expensive to carry out.
The researchers surveyed the 8,300 students in their schools during five weeks in February and March, using surveys with more 100 questions.
Using surveys that showed where visitors to the park lived, Ms. Thomas prodded Brooklyn's elected officials to provide money.
Recent studies that have used the site have achieved response rates between 20percentand30percentcent using surveys that took about 10 to 15 minutes to fill out, he added.
Using surveys to get feedback on branding or new products is difficult because the depth of information they provide, particularly as users tend to provide answers very quickly, is limited.
Using surveys conducted in 1996 and 1998, Mr Oyer has examined the career choices and salaries of thousands of the school's graduates.
Some companies are using surveys and social media channels like Facebook, Twitter and Pinterest to learn more about customers they could reach via smartphone.
That is because the number employed in America is also still measured using surveys, and the two that are widely used tell different stories.
According to research we have done using surveys of thousands of American adults, this is the case for attitudes toward the issue at the heart of the Romney campaign's recent ad blitz, welfare.
There was a time when radio programmers — and the record labels who lobbied them — largely defined the charts, using surveys of their listeners and their gut instincts to select hits.
Using surveys and questionnaires, online sellers are finding out details about body type that are crucial to a correct bra fit but not easily shared with a sales person.
