Ruut Veenhoven is a Dutch sociologist who has conducted cross-cultural research into happiness since the 1980s. In his World Database of Happiness, he has compiled data on happiness studies from countries all over the world into a publicly available Website (www.worlddatabaseofhappiness.eur.nl). There is also data on the correlates of happiness. For example, how much do political freedom and gender equality correlate with happiness? Veenhoven derives much of his findings from a ten-point scale ranging from 0 = most dissatisfied to ten = most satisfied.