New mobile development platforms have created an enormous opportunity for applications innovation by lowering the costs of R&D and attracting the largest body of potential app demanders ever assembled. This has created an explosion of app suppliers, numerous and diverse. In this early stage of...

Economy-wide increasing returns to scale embodied in a general purpose technology (GPT) and its applications are often a key source of long-run growth. Yet the successful exploitation of increasing returns calls for coordination on a particular technological direction, reducing flexibility and...