Long term trends in happiness and income are not related; short term fluctuations in happiness and income are positively associated. Evidence for this is found in time series data for developed countries, transition countries, and less developed countries, whether analyzed separately or pooled....

There is no significant relationship between the improvement in happiness and the long term rate of growth of GDP per capita. This is true for three groups of countries analyzed separately - 17 developed, 9 developing, and 11 transition - and also for the 37 countries taken together. Time series...

In Europe differences among countries in the overall change in happiness since the early 1980s have been due chiefly to the generosity of welfare state programs - increasing happiness going with increasing generosity and declining happiness with declining generosity. This is the principal...