ALA's Digital Content and Libraries Working Group has released EBook Business Models: A Scorecard for Public Libraries.
Here's an excerpt:
The Digital Content & Libraries Working Group (DCWG) began documenting and describing attributes of various licensing arrangements libraries may have with publishers in the August 2012 report Ebook Business Models for Public Libraries. Now we are pleased to share The Ebook Business Model Scorecard, which more fully examines the variables often seen in ebook license agreements or contracts. At the same time, the variables, when considered as a whole, can help libraries conceptualize licenses holistically instead of fixating on one aspect of a contract in isolation.