How The Chronicle's Ranking of America's Top Donors Was Compiled

The Chronicle's ninth annual Philanthropy 50, a list of the most-generous donors, is based on gifts and pledges of cash and stock to nonprofit institutions.

As a springboard, The Chronicle used information it has published in the last year about donations of $1-million or more from individuals; it also conducted additional research on wealthy people and their donations to charitable organizations last year.

Although the newspaper attempted to compile all