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Given the effectiveness shown for the creation of collaborative environments of social network sites and the scarcity of work on their use by researchers, the purpose of this article is the analysis of the use of communi...

Health behavior change is our greatest hope for reducing the burden of preventable disease and death around the world. Tobacco use, sedentary lifestyle, unhealthy diet, and alcohol use together account for almost one mil...

Bowling Alone: America’s Declining Social Capital Robert D. Putnam (bio) Many students of the new democracies that have emerged over the past decade and a half have emphasized the importance of a strong and active civi...