IPA Founder and President, Dean Karlan, has an op-ed in the Los Angeles Times, in which he discusses his and student Elijah Goldberg's analysis of 55,000 charitable organizations tax returns. Despite prominence of high profile fraudulent charities in many minds ("availability bias" in scientific terms), they find high overhead expenses very rare, and discusses why donors should skip checking organizations' overheads in favor of more meaningful outcomes. Read the whole piece here.