The New York Times is not impressed with Mark Zuckerberg’s decision to donate the vast majority of his Facebook stock to charity. “He created a limited liability company, one that has already reaped enormous benefits as public relations coup for himself,” it writes. “An L.L.C. can invest in for-profit companies (perhaps these will be characterized as societally responsible companies, but lots of companies claim the mantle of societal responsibility).”

To give away their fortune, why did Mark Zuckerberg and his wife set up their charitable arm as a limited liability company? Four reasons, according to Bloomberg Businessweek: There are no limits on its lobbying activity; the charity can turn a profit; it will be easier to form joint ventures; and the use of a corporate structure avoids a rule about having to give away 5% of a nonprofit foundation's value every year.