Within the user-generated content sites, the role and growth of social networking sites has been undeniably overwhelming. Social networking sites (SNS) generate millions of dollars in revenue and advertising, yet little is known about why college students join and participate in these sites, which allow users to create their own content or space. This study adopts survey methodology to investigate the influence of college students' level of Internet self-efficacy, need to belong, need for cognition, and collective self-esteem on their attitude toward SNS. Internet self-efficacy, need to belong, and collective self-esteem all have positive effects on attitudes toward SNS. Furthermore, attitude toward SNS mediates the relationship between willingness to join SNS and (1) Internet self-efficacy and (2) need to belong, and the mediation is only partial between willingness to join and collective self-esteem. The author also draws managerial implications.

With the advent of popular Web destinations such as MySpace and Facebook, online social networking communities now occupy the center stage of e-commerce. Yet these online social networking communities must balance the trade-off between advertising revenue and user experience. Drawing on the sociology and advertising literature, this study investigates the impacts of social identity and group norms on community users' group intentions to accept advertising in online social networking communities. By outlining how this type of group intention could influence community members' perceptions and value judgments of such advertising, this study delineates possible mechanisms by which community members may respond positively to community advertising. The authors test the proposed theoretical framework on a sample of 327 popular online community users in China and obtain general support. Implications for the prospect of advertising in online social networking communities are discussed.

Keywords: Online social networking communities, advertising responses, social factors.