For many high-tech and Internet-related products, utility to consumers depends in part on the size of the user base, a phenomenon called network externality. A firm with a portfolio of these and other products--that are often asymmetric in their degree of network externality or marginal...

In many durable goods industries, firms continuously offer new products to customers and market them in different versions through different channel of distribution. This paper examines the issue of when to introduce the product into the different channels. The determinants of entry time include...