Cost Effectiveness PWLE Sales 
Big Dog, Little Dog
JUNE 4, 2007
The idea that content on the web is "free" is mistaken: the hidden cost may be the demise of old media and entire art forms on which the free content depends. Personal Work and Learning Environments (PWLE) - eLearning Technology. Thinking is so over - Times Online.
Tony Karrer
FEBRUARY 19, 2008
If you think about the Long Tail graph, it works just as well when we substitute Attention instead of Sales. Cost is most often not a factor in a knowledge workers decision about the use of information. They look to eLearning approaches to lower distribution costs. They look to rapid authoring tools to lower production costs.
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