China, Korea and Japan are scoring high on both. Western countries other than USA are doing much better with PISA than IMO. And USA and Russia are doing much better @ IMO.
For success at IMO all you need is a small pool of strong performers – countries like Romania, Bulgaria and Hungary used to rank high.
3-4 of US team members (each team has 6 students) are with Asian names and 15-20 years ago there was 0-1.
