Hi Caroline,
Here are a few more that might be helpful:
- http://www.edisonresearch.com/wp-content/uploads/2013/04/Edison_Research_Arbitron_Infinite_Dial_2013.pdf (starting at page 42)
- http://www.emarketer.com/Article/Twitter-Better-Than-Facebook-Targeting-Teens/1010336
- http://hbr.org/web/slideshows/social-media-what-most-companies-dont-know/1-slide
- http://www.mckinsey.com/insights/high_tech_telecoms_internet/the_social_economy
- A few other sources are cited in this article - http://www.huffingtonpost.com/2013/10/23/facebooks-teen-trouble-in_n_4150940.html?1382555101
Hope this helps!
Tim
