"I'm happy to see the AAN is moving beyond a cookbook approach to this injury, " says Dr. Collins, who questioned the AAN grading system as too liberal in a 2004 study.

WSJ: Tougher Rules Advised for Athletes After Concussion

Although more than half of Harvard undergraduates end up in law, medicine or business, future doctors and lawyers must study a non-specialist liberal-arts degree before embarking on a professional qualification.

ECONOMIST: The difficulties of an American doctoral student

We did a study where we looked at liberal misperceptions about President Bush's policy on embryonic stem cell research and what we found there was that they didn't listen to the correction, but there wasn't a backlash effect either.

NPR: Campaign Attack Ads Call 'Facts' Into Question

In a subsequent study involving just self-described liberal students, Cohen gave half the group news stories that had accompanying Democratic endorsements and the other half news stories that did not.

NEWYORKER: Unpopular Mandate

"Certainly we come in contact with bacteria all the time, " Renee Godard, lead author of the study and professor of biology and environmental studies at Hollins University, a private liberal arts college in Roanoke, Virginia.

CNN: Soda fountains contained fecal bacteria, study found

The Scottish Liberal Democrat MSP for Orkney Tavish Scott backed Elaine Murray's calls for a moratorium and socioeconomic study into the impact of the withdrawal of RET to hauliers and said there were "serious concerns from hauliers and in the islands" about the plans.

BBC: Labour: RET debate

If Germany were to reduce services regulation to the level of the most liberal countries, it could boost annual productivity growth by a percentage point a year over ten years, says one study.

ECONOMIST: German services