Theories of the evolution of niche breadth usually depend on the assumption that genotypes that are well adapted to exploit one habitat or resource are not well adapted to others. Such ‘‘trade-offs’’ are often apparent in interspecific comparisons, but have been harder to document at the within-population level. Selection experiments provide a promising means for detecting within-population tra...

Developing countries have increasingly opened their economies to trade. Research about trade policy in developed countries focuses on a bottom-up process by identifying economic preferences of domestic groups. We know less about developing countries. We analyze how economic and political variables influenced Costa Rican voters in a referendum on CAFTA, an international trade agreement. We find ...

The competitiveness of the South African metals manufacturers is under spotlight, since new investments in and engineering industry Africa have been poor, growth Chinese trade has had a negative competitive effect on domestic manufacturing output employment. purpose study was to determine how supportive business intelligence process enabling successful practice. A theoretical model designed emp...