It is well known that the field of economics has a race and gender problem, with treasury secretary (and former Fed chair) Janet Yellen, Fed chair Jerome Powell, and former Fed chair Ben Bernanke among the many senior figures advocating for change. But economics has another diversity problem that’s been largely overlooked: socioeconomic background. In new research, we find that economics is the least socioeconomically diverse of any academic discipline in the U.S.