This is some of the better research in happiness I have read about - but, as usual, there are no philosophers involved which is even more bizarre in this case as the goal of the project is to give a precise definition of happiness. Still, at least they are aware of the cultural differences and some of the inherent ambiguities in thinking about happiness.
One problem with this project that is immediately apparent is their category "good mood". The stoics would ask: "Which kind of good mood are you talking about? Gladness, which is a passion and - as such - should be avoided? Or joy, which is the rational feeling we are all striving for whether we know it or not?"