It's not just how free the market is. Some economists are looking at another factor that determines how much a country's economy flourishes: how smart its people are. For a study published in an upcoming issue of Psychological Science, researchers analysed test scores from 90 countries and found that the intelligence of the people, particularly the smartest 5%, made a big contribution to the strength of their economies.
The researchers collected information on 90 countries, from the US to New Zealand and Colombia to Kazakhstan. They also collected data on the country's excellence in science and technology - the number of patents granted per person and how many Nobel Prizes the country's people had won in science, for example.