1. Census: Income gap between rich and poor got wider in 2009http://www.usatoday.com/money/economy/2010-09-28-census-income-gap_N.htm
2. Teens and mobile phones: Text messaging explodes as teens embrace it as the centerpiece of their communication strategies with friendshttp://pewinternet.org/Reports/2010/Teens-and-Mobile-Phones.aspx
3. Tuning in, tuning out: The strange disappearance of social capital in America;Putnam;PS: Political Sci. Politics,1995
4. Bowling Alone: The Collapse and Revival of American Community;Putnam,2000
5. Social Isolation and New Technologyhttp://www.pewinternet.org/Reports/2009/18--Social-Isolation-and-New-Technology.aspx