U.S. Drops Out of Top Ten Most Prosperous Countries

From the article:

Scandinavian countries have continued to dominate the top of the global index, which takes measurements from across eight categories: economy, education, entrepreneurship & opportunity, governance, health, personal freedom, safety & security and social capital.

Norway, Denmark and Sweden are ranked first, second and third place respectively.

. . .But the U.S. has dropped out of the Legatum Prosperity Index's top ten for the first time to 12th position.

(Full story here).

I wonder if there is some bias at operation here.