I am looking for public data sources about specific target groups. Although doing your own research probably gives the best results, having a kind of database with common target audiences would be a great help to get started and/or for budget strained projects.

Specifically, I am currently looking for data on media buyers. This question is more general, though, because I would love to build a resource list which can help with future projects and audiences.

So far I have found https://www.quantcast.com/, which gives you data on audiences of many websites. So if you know which site targets the same audience as your project, you can get some nice data from there. Another nice angle (if you are looking for data on users segmented by profession) is to check the profiles of job postings which often give a good idea about the education level & skills of the users.

Do you know any other sources of aggregated data?

closed as too broad by Graham Herrli, ChrisF, Charles Wesley, rk., Benny Skogberg Nov 13 '13 at 11:26

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    IMO, this question is out-of-scope of this site. – kmonsoor Nov 9 '13 at 22:39