W quantify how user mobile Internet usage relates to unique characteristics of the mobile Internet. In particular, we focus on examining how the mobile-phone-based content generation behavior of users relates to content usage behavior. The key objective is to analyze whether there is a positive or negative interdependence between the two activities. We use a unique panel data set that consists ...

Typically, the success of a collaboration technology depends on its adoption by all participants in the collaboration. But as organizations become more distributed (Castells, 1996), the challenge increases to achieve uniform adoption across geographic distance, and across organizational boundaries. In an earlier study, Mark and Poltrock (2001) discovered that the rapid and widespread adoption o...

OBJECTIVE The aim of this study was to analyze social characteristics and stress as correlates of cigarette smoking in adolescence. The main intent was to identify elements that distinguish adolescents who had experimented with smoking and did not progress to regular smoking from those who became current smokers. METHODS Students at 10 high schools in the city of Ribeirão Preto, Brazil, compl...

Facebook is one of the most popular Internet sites today. A key feature that arguably contributed to Facebook’s unprecedented success is its application platform, which enables the development of third-party social-networking applications. Understanding how these applications are installed and used is important for the function and utility of web-based online social networks, e.g. to better eng...