Using a variety of tests, they found virtually no correlation between an individual country’s GDP growth rate per head and the returns to investors.
用了多种测验，他们发现实际上每个国家的GDP增长和给投资者的回报毫无关联。
2
Using a variety of tests, they found virtually no correlation between an individual country's GDP growth rate per head and the returns to investors.
用了多种测验，他们发现实际上每个国家的GDP增长和给投资者的回报毫无关联。
3
People are fleeing the cold: there is a strong correlation between the average temperature in January and population growth, notes Edward Glaeser, a professor of economics at Harvard University.