Selling as a topic has received very little academic study.

Solid fluorine received significant study in the 1920s and 30s, but relatively less until the 1960s.

While the surface concentrations of these two gases have received much study, less is known about their distribution in the middle and upper troposphere.

In comparison to other aspects of war, war termination has received relatively less study.

The neurotransmitter systems involved in wheel-running behavior have received considerable study.

Capital costs and system lifespan have received much less study, and the return on investment is highly variable.

Of the entire student population, 74% receive financial aid, and 17% study abroad before graduating.

Not surprisingly then, the two of these mutations that have received further study show incomplete inactivation.

The business implications of these proposals, which came late in the legislative session, have received little study.

The philosophical implications of Skolem's paradox have received much study.