Another way to figure the ebook marketshare is from Nook digital content data.
http://www.digitalbookworld.com/2012...ontent-up-119/
Quote:
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Digital content sales on the Nook were $483 million for the year
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What is the marketshare of the Nook?
20% market share? = $483 mil x 5 = $2415 mil
25% market share? = $483 mil x 4 = $1932 mil
PWC # is for North America, not just USA.
2011: $2,696 mil looks about right when it is data for USA + Canada + Mexico