"Fragmentation of stages of the production process is determined by international cost differences and by the benefits of co-location of related stages. The interaction between these forces depends on the technological relationships between these stages. This paper looks at both cost minimising...

"In this paper we develop a monopolistic competition model where firms exercise their market power across multiple products. Even with CES preferences, markups are endogenous. Firms choose their optimal product scope by balancing the net profits from a new variety against the costs of...