must inevitably involve a greater degree of structural adjustment if significant differences between members of the European Community are not to lead to major imbalances between regions. Since the 1950s West Germany has been a major force in the world economy and its success in the world market for manufactures, along with Japan, has brought about major shifts in the global balance of economic power. In this paper, we investigate the performance of the West German manufacturing sector in world export markets. We use a formal model based on cost minimization in order to derive the supply factors at work. The majority of previous approaches have emphasized demand factors. Such models have generally been rather unsuccessful in explaining long-run trends in export performance.1 Part of the problem may be the omission or inappropriate choice of supply side factors. In this paper, we therefore take into account both supply side and demand side factors and apply the model to the West German manufacturing sector as well as to the mechanical engineering and motor vehicle industries within manufacturing. Our choice of these two industries reflects the observation that they have a considerable revealed comparative advantage in world export markets and are therefore most likely to disclose the underlying factors at work in the 1 See the debate between Landesmann and Snell [1989] and Holly and Wade [1991], for example.