One of the first questions I ask when I think about donating to a particular charity is what their overhead is – that is, how much money the spend on personnel and marketing and everything else it takes to administer their relief efforts. This kind of information is readily available and I use it to determine a sense of the charity’s efficiency – the lower the overhead, the more money goes directly to the recipients of the aid I and others give. Of course I assume the reverse is true as well: the higher the overhead the more wasteful the charity is and less deserving of my support. In this provocative TED Talk based on his book...