What the data shows

- The order is close: rank correlation 0.85, and an average miss of 0.49 steps.
- Exact bins are hard: it lands in the right half-point bin for 26% of countries.
- Its biggest misses have a story: it overrates Botswana (5.9 vs 3.5), Afghanistan (3.7 vs 1.4, the lowest of all 145) and Malawi (4.7 vs 3.3); it underrates Venezuela (3.9 vs 5.8), Libya (4.0 vs 5.7) and Serbia (5.5 vs 6.7).
- Not a wealth error: its misses don't follow GDP per head. By region, it runs a little low for North America (-0.40) and a little high for Africa (+0.36).
What it means, and what it doesn't
Jev knows the broad shape of the world's happiness map. Its misses look like a picture assembled from news: countries known for crisis get a lower guess than people there give themselves (Venezuela, Libya), and some recent collapses haven't registered (Afghanistan, Botswana).
It doesn't show Jev reasons from wealth to happiness; that was the error the study looked for, and it isn't there.