This document discusses factors that influence user adoption of social media features. It summarizes current research on relationships like strong ties, weak ties, and temporary ties. However, it argues this research does not predict which tools people will use. Instead, it proposes examining specific social transactions and whether tools make those transactions easier and cheaper by reducing "permission boundaries," which capture the costs of sharing information online. Tools that facilitate transactions with strong ties through low permission boundaries will see more adoption.
Related topics: