The article looks at how healthcare efficiency changed in OECD countries from 2000 to 2011. They used a method called Data Envelopment Analysis to measure efficiency and the Malmquist Index to track productivity growth. The study found that healthcare production improved by 0.8% each year, with a total 8.5% technical and 7.2% productivity increase over the period. While technology progress stayed steady, changes in efficiency from using new technologies drove most of the productivity growth.