Happiness measure, code: O-HL-g-sq-?-11-a

Selfreport on single question:

How happy are you on a day-to-day basis?

Rating scale not reported. Assumed to be 0-10 numerical
Focus, O-HL Overall: Happiness in Life
Time frame, g generally
Mode, sq 1 question
Scale type, ? scale not reported Range = 11
Used in studies