Why are performance trade-offs so rarely detected in animals when their underlying physiological basis seems so intuitive? One possibility is that individual variation in health, fitness, nutrition, development or genetics, or 'individual quality', makes some individuals better or worse performers across all motor tasks. If this is the case, then correcting for individual quality should reveal ...

Trade costs have fallen surprisingly little given the large increase in international trade in the last 50 years. This paper examines whether trade costs are properly measured. I show theoretically that trade weighted measures will underestimate the changes in trade costs when there are fixed market entry costs and quality differences. Newly traded goods enter at higher trade costs than previou...

The effects of the institutional determinants on trade in agricultural and food products are analyzed using a gravity model approach. We focus on the impact of the quality of governance and the similarity of institutions in explaining variation in bilateral agricultural and food trade patterns among the OECD countries. Results confirmed the separate effects for the institutional similarity and ...

time, cost and quality are considered as the main components in managing each project. previous researches have mainly focused on the time-cost trade-off problems. recently quality is considered as the most important factor in project�s success, which is influenced by time acceleration that is the less time is spent the more success is gained. in time-cost-quality trade-off problems, each act...

International trade has been incorporating various aspects of environmental issues since 1970. The extent to which environmental problems might affect many facets of trade, or vice versa, has been the subject of considerable debate over these years. In this article we have attempted to establish some of the links between international trade and environmental quality by performing a comprehensiv...

I explore variation in price and export status in industries where I can estimate product quality and technical efficiency separately. The empirical results show that prices are increasing in quality and decreasing in efficiency and that selection into exporting is driven mainly by quality. Firms export because they generate more demand for their products, not because they can produce at lower ...