Medicare for All advocates just received an early holiday present: a new study from the Political Economy Research Institute (PERI) at the University of Massachusetts-Amherst finds that single-payer health care will save the US $5.1 trillion over a decade while drastically cutting working-class Americans’ health spending. It’s the most robust, comprehensive study yet produced on Medicare for All, which has long been in need of easily citable research.

The study analyzes Sen. Bernie Sanders’s Medicare for All Act from top to bottom, elaborating on several key aspects of the bill, including what the transition to a fully public, comprehensive, free-at-the-point-of-use health care system might look like and what impact the program will have on US residents. Most significantly, it answers the most common question single-payer advocates face: “How will we pay for it?”

The findings are impressively thorough. Reaching nearly two hundred pages in length, the report has been praised by health policy experts for its sound methods and clarity. Alison Galvani of the Yale School of Public Health predicts it will become recognized as the “seminal analysis” of Medicare for All.