This study expanded through 18 countries and questioned 90,000 workers around the world.

Yet several studies have questioned the effectiveness of high-school driver education programs.

Another study probably will question foreign investment in the United States.

The study also questions the effectiveness of the nation's huge prison construction program in the past two decades.

But a new study has questioned the rules that govern such citizen lawmakers.

Two 2008 studies, both published in the same issue of Scienceexpress, questioned the previous assessments.

Later, studies by doctors and surveys of those who became sick questioned that conclusion.

He is aware that many studies question whether the pupil-teacher ratio affects how well students learn.

A study questioned the bull dog reputation as a dangerous breed.

But the study questioned the wisdom of turning patients away.

The institute was one of the first groups to study the question.

"It took me two hours to study, write and ask questions of myself for the next day's class."

It emphasized a need to study the question, as the agency now plans to do.

Those who have studied the question agree that the new system will cost consumers more.

Two years later he was sent to the Congo to study the question of foreign bases there.

He also mentioned that the national organization had formed a commission to study the question of safety for girls.

Socrates is said to have studied the question of how a person should best live, but he left no written works.

They'll study the question, form a committee or two.

However, clinical trials cannot always be used to study questions about screening.

B. However, he never practiced medicine, instead studying social and economic questions.