Data on giving
The Center on Philanthropy www.philanthropy.iupui.edu
The Center on Philanthropy (at Indiana University - Purdue University Indianapolis) is a leading academic center that increases the understanding of philanthropy and improves its practice through teaching, research, public service and public affairs activities throughout the world.
Giving Institute www.aafrc.org
The American Association of Fundraising Counsel and Giving USA educate and engage members in the ethical delivery of counsel and related services to nonprofit organizations through research, advocacy and best practices.
National Center for Charitable Statistics www.nccs.urban.org
The National Center for Charitable Statistics is the national clearinghouse of data on the nonprofit sector in the United States.
