long tail music sales stats

Digital Audio Insider has a blurb noting Anita Elberse of Harvard Business School’s look at the Long Tail.

Of the 3.9 million digital tracks sold in 2007 (the large majority for 99 cents each through Apple iTunes), an astonishing 24% sold only one copy, and 91% — 3.6 million tracks — sold fewer than 100 copies.