A large part of the empirical work on differentiated products markets has focused ondemand estimation and the pricing behavior of firms. These two themes are key inputsin important applications such as the merging of two firms or the introduction of newproducts. The validity of inferences,...

The Internet has a loosely hierarchical structure. At the top of the hierarchy are the backbones, also called Internet Access Providers (hereafter IAPs). The second layer of the hierarchy is comprised of Internet Service Providers (hereafter ISPs). At the bottom of the hierarchy are the end...

This paper examines the components of the Capital Asset Pricing Model and the modelâs uses to analyze portfolios returns. It also looks at subsequent versions of the CAPM including a multi-variable CAPM with the inclusion of selected macro-variables as well as a non-stationary beta CAPM to...

Chapter 2 deals with a linear city model à la Hotelling where the two firms share linear transport costs with their customers. Mill pricing and uniform delivery pricing are special limiting cases. We characterize the conditions for the existence of a pure strategy equilibrium in the two-stage...

This collection of papers originates from myinterest in the reform efforts in transitionaleconomies. Each of the chapters is self-contained.Chapter one presents a brief literature surveyof those schools of thought that have contributedto our knowledge about privatization.In chapter two, a public...