I seem to remember that the question "overall, how satisfied are you with your life?" has been routinely asked on large-scale surveys since the 1970s but I cannot find a scientific reference to this. Anybody?
Thanks for replying, Firoz Ahmad. Following the links you have posted about the National Wellbeing programme(s) I could not, unfortunately, find the specific reference I am after.
Let me try and be more specific. I am looking for the first instance that surveys (preferably a large-scale nationally representative survey) asked respondents about how satisfied they are with their life. In the German SOEP it was 1986, in the British BHPS it was 1996 but these cannot be the first instances as there are papers from earlier dates that use life satisfaction data from other surveys.