We present a new model of multi-product firms (MPFs) and flexible manufacturing and explore its implications in partial and general equilibrium. International trade integration affects the scale and scope of MPFs through a competition effect and a demand effect. We demonstrate how MPFs adjust in...

This paper extends the standard model of bundling to allow products to be substitutes and for products to be supplied by separate sellers.  Whether integrated or separate, firms have an incentive to introduce a bundling discount when demand for the bundle is elastic relative to demand for...

The aim of this paper is to provide empirically testable predictions regarding the relationship between market size and concentration. In a model of endogenous horizontal mergers, it is shown that concentrated outcomes cannot be supported in a free entry equilibrium in large exogenous sunk cost...

I present a trade model featuring North-South differences in demand for quality and in quality of task supply.  The model explains a number of stylised facts: Southern firms charge higher factory-gate prices for their products in rich than in poor, and in distant than in near markets.  The...

Consumption in the time of Internet is characterized by extremely low search costs, leading to increased product diversity (the long tail) and large mainstream products (superstars).  In this paper, I show how the mainstream taste can be catered by a niche product, while minority tastes can be...

We study the effect of hyperbolic discounting on competitive equilibria in secondary markets for a durable good. Under exponential discounting, secondary markets are irrelevant in our model. They do not affect the price in the initial period and are neutral to the allocation. Under hyperbolic...

We construct a unique panel dataset to examine how R&D and intellectual property (IP), via patents and trade marks, increase firm productivity. Knowledge has public good characteristics of non-depletability and non-excludability. Even with IP, imitation and inventing around other firm`s products...

List prices are not completely credible as take it or leave it prices: buyers are able to seek reductions by bargaining with firms. We show that this realisation leads to the existence of a critical threshold number of competitors in an industry which depends on fundamentals. In industries with...

This paper analyses the implications of bargaining between buyers and sellers on the competitive outcome in a homogeneous good industry. Bargaining creates a competitive equilibrium in which some inefficient sellers coexist with efficient ones leading to productivity dispersion. Rival cost...