03/18/2010 05:12 am ET Updated May 25, 2011

More Charities Seek Tax Break for Donors, Costing U.S. Billions

Experts say nonprofits are skillfully exploiting the tax code's broad and elastic definition of what constitutes such a charity, making it difficult for the Internal Revenue Service, which must bless them, to say no. The agency approved 99 percent of the applications for public charity status last year, according to a new study by students at Stanford University -- or more than one every 10 to 15 minutes.

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