ALIA (the Australian Library and Information Association) launched in 2013 a report (based on a survey) studying the e-lending in Australian public libraries. The same survey was carried out in May 2014, and a month later they released its results: the ”Comparison of e-Books and e-Lending in Australian Public Libraries 2013 V 2014“, which you can see here: http://goo.gl/0VZi1F
In April 2014 they released the Elending Landscape Report 2014, which “identifies worldwide public library initiatives to secure ebooks for borrowers”. The report was prepared by Brussels-based Civic Agenda. We published a post about it a few months ago.