This paper reviews the theory of foreign direct investment (FDI), focusing on an apparent conflict between theory and recent trends in the globalized world. The bulk of FDI is horizontal rather than vertical, but horizontal FDI is discouraged when trade costs fall. This seems to conflict with...

This paper reviews alternative approaches to measuring an economy's cost competitiveness and proposes some new measures inspired by the economic theory of index numbers. The indices provide a theoretical benchmark for estimated real effective exchange rates, but differ from standard measures in...

This paper studies the welfare losses from tariff protection in a general model of a small open economy where some factors are internationally mobile. It is shown that, as long as the economy remains incompletely specialised international factor mobility must raise the cost of protection. This...

This paper presents a non-technical introduction to the analysis of how an open economy adjusts to exogenous shocks. Three alternative models of adjustment are considered, each one appropriate to a different time horizon: the specific-factors model with transitional unemployment for the short...

The latest World Bank estimates of real GDP per capita for China are significantly lower than previous ones. We review possible sources of this puzzle and conclude that it reflects a combination of factors, including substitution bias in consumption, reliance on urban prices which we estimate...

We develop a new model of multi-product firms which invest to improve both the quality of their individual products and of their brand. Because of flexible manufacturing, products closer to firms' core competence have lower costs, so they produce more of them, and also have higher incentives to...

In this chapter we present a selective analytic survey of some of the main results of trade under oligopoly. We concentrate on three topics: oligopoly as an independent determinant of trade, as illustrated by the reciprocal-markets model of Brander (1981); oligopoly as an independent rationale...

This paper compares adversarial with cooperative industrial and trade policies in a dynamic oligopoly game in which a home and foreign firm compete in R&D and output and, because of spillovers, each firm benefits from the other’s R&D. When the government can commit to an export subsidy, such a...

I argue that increased foreign competition can affect technical choice and skill differentials even when actual imports do not rise significantly. I present a model of General Oligopolistic Equilibrium ("GOLE") in which a reduction in import barriers (whether technological or policy-imposed)...

We introduce the concept of cooperative substitutes and complements, and use it to throw light on the conditions for a research joint venture to choose equal levels of R&D by all member firms. We show that the second-order conditions for a symmetric optimum take a particularly simple form,...