Under plausible assumptions about preferences and technology, the model in this paper suggests that the entire volume of world trade matters for wage inequality. Therefore, trade integration, even among identical countries, is likely to increase the skill premium. Further, we argue that empirical evidence of a falling relative price of skill-intensive goods can be reconciled with the fast growt...

We develop a model of endogenous quality choice and trade that combines non-iceberg trade costs and non-homothetic preferences to capture the effect of importer-exporter income differences on geographic variation in quality and export prices. The differences in income substantially alter the effect of trade costs on quality. The incentive to trade high quality goods given high trade costs (the ...

Signal-based induced indirect defence refers to herbivore-induced production of plant volatiles that attract carnivorous natural enemies of herbivores. Relationships between direct and indirect defence strategies were studied using tritrophic systems consisting of six sympatric willow species, willow leaf beetles (Plagiodera versicolora), and their natural predators, ladybeetles (Aiolocaria hex...

Skyline Queries have recently received a lot of attention due to their intuitive query capabilities. Following the concept of Pareto optimality all ‘best’ database objects are returned to the user. However, this often results in unmanageable large result set sizes hampering the success of this innovative paradigm. As an effective remedy for this problem, trade-offs provide a natural concept for...