We examine patterns of acquiring non-native languages in a model with two languages corresponding to two populations with heterogeneous learning skills, where every individual faces the choice of self learning the foreign language or refraining from doing so. We then introduce a...

Media industries are important drivers of popular culture. A large fraction of leisure time is devoted to radio, magazines, newspapers, the Internet, and television (the illustrative example henceforth). Most advertising expenditures are incurred for these media. They are also mainly supported...