New goods are at the heart of economic progress. The eleven essays in this volume include historical treatments of new goods and their diffusion; practical exercises in measurement addressed to recent and ongoing innovations; and real-world methods of devising quantitative adjustments for...

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...