Teenagers with multiple concussions can exhibit memory loss, amnesia and significantly lower grade-point averages than teenagers without head injuries.

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Those who are accepted typically have undergraduate grade-point averages of more than 3.6 and Graduate Record Examination scores exceeding 1, 200, he said.

CNN: July 24, 2012 -- Updated 0228 GMT (1028 HKT)

Much has been made of the fact that women are quickly outpacing men at American Universities - in numbers and in grade point averages.

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Because the rankings consider the grade-point averages and scores on the Law School Admissions Test, schools are pulling out the stops to make sure the highest-caliber students are applying and matriculating.

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Over the three-year observation period, the African-American students who took part in the study had higher grade-point averages relative to multiple control groups, and the minority achievement gap overall was reduced by a dramatic 50%.

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The whole point of these figures is that they are averages, they tell us how we're doing compared to other parts of Europe - parts that haven't been immune to the economic downturn.

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Obama carries a three-point poll lead over John McCain, according to Real Clear Politics, which averages the major tracking polls from Gallup, Zogby, Rasmussen and others.

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Yes, we do indeed expect interest rates to rise at some point in the future, we do expect them to get back to something approaching historical averages.

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