You might find some of these reports useful. Some reports are held as PDF documents within the site and others link to other sites.

Global Impact Investing Network (GIIN)
Global Impact Investing Network (GIIN) network are releasing their report on The State of Impact Measurement and Management Practice . The report provides a comprehensive survey of the state of...
The Philanthropy Workshop
TPW's “Going Beyond Giving" Report seeks to better understand high and ultra-high net worth philanthropists' motivations, actions, and practices. It is the first study to include a sample of TPW's...
Charities Aid Foundation & ACEVO
Generating income and achieving financial sustainability is the most pressing challenge for charity CEOs. This is compounded by a reduction in funding from statutory sources, the third most pressing challenge...