Empirical evidence strongly suggests that R&D increases a firm’s "absorptive capacity" (its ability to absorb spillovers from other firms) as well as contributing directly to profitability. We explore the theoretical implications of this. We specify a general model of the absorptive capacity...

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 presents a general result for simultaneous reform of tariffs and quotas in a small open economy, where some of the quota rents do not accrue to domestic residents. Absent highly perverse income effects, welfare must rise following a uniform proportionate reduction in tariffs and 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,...

I review previous approaches to modelling oligopoly in general equilibrium, and propose a new view which in principle overcomes their deficiencies: modelling firms as large in their own market but small in the economy as a whole. Implementing this approach requires a tractable specification of...

This paper endogenises the extent of intra-sectoral competition in a multi-sectoral model of oligopoly in general equilibrium. Firms choose capacity followed by prices. If the benefits of capacity investment in a given sector are below a threshold level, the sector exhibits Bertrand behaviour,...

This paper reviews progress to date towards a new trade agreement under the Doha Development Agenda. Some of the key issues in contention are examined, including barriers to trade in agriculture and manufacturing, intellectual property rights, and competition policy. A potential sticking point...

We show that the effects of tariff changes on welfare and import volume can be fully characterised by their effects on the generalised mean and variance of the tariff distribution. Using these tools, we derive new results for welfare- and market-access-improving tariff changes, which imply two...