Sport Participation and Subjective Well-Being: Instrumental Variable Results From German Survey Data.Published in:Journal of Physical Activity & Health, 2014, v. 11, n. 2, p. 396, doi. 10.1123/jpah.2012-0001By:Ruseski, Jane E.;Humphreys, Brad R.;Hallman, Kirstin;Wicker, Pamela;Breuer, ChristophPublication type:Article