We introduce a simple two-stage game of endogenous network formation and information sharing for reasoning about the optimal design of social networks like Facebook or Google+. We distinguish between unilateral and bilateral connections and between targeted and collective information sharing....

Traditional conceptions of learning focus on the formal learning that occurs in contexts such as school and higher education. These however form only part of the learning experience for any individual. Indeed for adults, most learning will occur outside formal contexts either informally or...