A new book just arrived here in the law library (its catalog record is copied below).  A couple of callouts:

Costs:

“The organizations in the sample spent a mean of $ 78,802 to develop the repository, with costs ranging from essentially nothing to one half million dollars.  Median spending was $ 30,000. . . . Mean spending in the USA was less then elsewhere, perhaps reflecting the greater number of institutional initiators of digital repositories in the USA.”  p. 25.

Software:

A sixth of the libraries in the sample used Digital Commons sofware, and 28% of US-based repositories used this product. . . . 37.04% . . . used DSpace, including more than 83% of the developing countries . . . ” p. 26

Title: The international survey of institutional digital repositories.
Edition: 2008 ed.
Imprint: [New York] : Primary Research Group, c2007.
Physical Description: 127 p. ; 28 cm.
Note: Chiefly tables.
          Subject (LC): Institutional repositories–Statistics.
          Subject (LC): Digital libraries–Statistics.
          Subject (LC): Library surveys.
          Organization: Primary Research Group.
                  ISBN: 9781574400908
                  ISBN: 1574400908

CALL NUMBER                                           
ZA4081.86 .I58 2007