What buys happiness? analyzing trends in subjective well-being in 15 European countries, 1973-2002

"Trends in life satisfaction are examined across 15 European countries employing a modified version of Kendall's Tau. Analyses show that GDP growth relative to growth in the preceding period is a significant determinant of the trends; the same holds for the growth in life expectancy while the contemporaneous growth in the current account balance exerts a positive influence. Relative unemployment growth becomes significant when interacted with a measure of the long-run political ideology of the median voter. The effects of relative GDP growth vary with the political ideology variable"--Forschungsinstitut zur Zukunft der Arbeit web site.