It is well known that random parameters specifications can generate upward sloping demands for a subset of products in the data. Nevo (2001), for example, found 0.7 percent of demands to be upward sloping. Possibly less well known is that demand system estimates can imply margins outside of the...

The importance of economics to the analysis and enforcement of competition policy and law has increased tremendously in the developed market economies in the past forty years. In younger and developing market economies, competition law itself has a history of twenty to twenty-five years at most...

We model a two-level supply chain where Nash bargaining occurs upstream, while firms compete in a differentiated products logit setting downstream.The parameters of this model can be calibrated with a discrete set of data on prices, margins, and market shares. Using a series of numerical...