The long-standing goal of finding genes causing reproductive isolation is being achieved. To better link the genetics with the process of speciation, we propose that 'speciation gene' be defined as any gene contributing to the evolution of reproductive isolation. Characterizing a speciation gene involves establishing that the gene affects a component of reproductive isolation; demonstrating tha...

We examine multinationals’ optimal entry modes into foreign markets as a function of market size, FDI fixed costs, tariffs and transport costs. Our results highlight why large countries are more likely to attract acquisition investment, while intermediate sized countries may be served predominantly through trade, even in the presence of high tariffs. Small countries are most likely to experienc...

Recent literature on multinational firms has stressed the importance of low productivity as a barrier to the cross-border expansion of firms. However, firms typically also need external finance to finance the costs of market entry. In addition to productivity-related real barriers, financial constraints may thus restrict market entry. Building on a model of multinational firms facing real and f...

An individual-based simulation study was conducted to examine the population dynamics of 'invasion of a vacant niche' and subsequent speciation (by reproductive isolation) when food resources are randomly distributed spatially within the habitat and the frequencies of different food types are bimodally distributed (i.e. smaller and larger sizes of food being most abundant). The initially vacant...

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This study examines the factors affecting the propensity of firms to engage in cross border activities in a world of increasing returns. A model connecting outward FDI from the US with a set of firm-specific advantages is estimated on samples of industries dominated by increasing and diminishing return processes. Wymbs and Luisa Corrado on earlier drafts are gratefully acknowledged.

This paper aims at empirically exploring the relationships between existing object-oriented coupling, cohesion, and inheritance measures and the probability of fault detection in system classes during testing. The underlying goal of such a study is to better understand the relationship between existing design measurement in OO systems and the quality of the software developed. Results show that...

Traditionally seen as the ‘soft’ side of the business there is now substantial evidence to show that incorporating consistent satisfaction measurement, acting on patient feedback and developing leaders to elevate the priority in these areas improves patient loyalty, improves operational effi ciency, improves the capacity to treat more patients, retains staff and ultimately provides increased fi...