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URL:  http://boards.fool.com/one-option-common-in-academic-circles-is-to-use-30535626.aspx

Subject:  Re: What is your Avg Portfolio PE? Date:  2/11/2013  12:38 AM
Author:  physdude Number:  13485 of 19393

One option common in academic circles is to use the log of the ratio as this is agnostic to the directionality of the fractions. It always leads to somewhat sensible results (though geometric averages might be more difficult to intuitively get).
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