Most studies of social services, however, tend to look at them from the historical or development view.

But studies have also tended to show that smaller schools cost more to run.

Recent studies tend to support three species, but this is certainly not definite.

But such studies tend to look at the industry in its entirety.

Indeed, both studies tend to borrow elements from one another.

Such large studies, investigators said, tend not to be repeated.

Studies sponsored by drug companies tend to show an advantage for the company's own products.

The one-year success rates reported in studies tend to range from 15% to 25%.

Also, such studies tend to select healthier and younger patients.

Some studies tend to focus on psychological abuse within the workplace.