For a real-world example of the effect of lower search costs, think of today's e-reader price wars.

ECONOMIST: Economics focus

But will the study have a big effect in the real world?

FORBES: Three Reasons That Big HIV Study May Be Less Important Than It Seems

In the real world this would be pretty flimsy proof of a cause-effect relationship.

FORBES: Magazine Article

I'm afraid, are inviting serious harm to what is arguably the single most important asset that makes our military second to none in the world - namely, the ability to use in real time and with great effect intelligence.

CENTERFORSECURITYPOLICY: 9/11 Families for a Secure America

They criticize some studies purporting large effect sizes in that the treatment fidelity is highly unlikely to be achieved in real world settings or the students sampled are not typical of students currently receiving special education.

FORBES: There Are No Silver-Bullets in Education Reform

Researchers question how much effect new rehab treatments have, how long it will last and whether lab training translates to the real world, says Edward Taub, a researcher at the University of Alabama at Birmingham, who wasn't involved in Friday's work.

WSJ: Split-Belt Treadmill Therapy for Stroke Patients