We analyze the effect of entry on the technology adoption and calling plan choices of incumbent cellular firms. Focusing on the time period from 1996, when incumbents enjoyed a duopoly market, to 1998, when they faced increased competition from personal communications services (PCS) firms, we...

We focus on four important features of mobile targeting. First, consumers' real-time locations are known to sellers. Second, location is not the only factor determining how responsive consumers are to discounts. Other factors such as age, income and occupation play a role, which are imperfectly...