We proceed to explore the relative roles of postal density and volume as delivery cost drivers.

The research should contribute to understanding about the relative roles played by material circumstances and political mobilisation in the shaping of attitudes to welfare.

It also took into account soaring emissions from fossil fuel burning since 2000, which reduces the relative role of deforestation.

To gauge the relative roles of nature and nurture in the making of a trial lawyer, he is considering testing law students.

(p. 71) They do however differ on the relative role of selection and variation.

It is possible that these mechanisms co-occur although the relative roles of each have not been evaluated adequately.

The relative roles of different receptors is still under much debate, but evidence has emerged for some targets being involved with particular anaesthetics.

"What relative roles each of these played, we don't know for sure," he says.

The study failed to establish the relative roles, its primary objective, concluding that more research was needed.