“…More generally, several personal, demographic, socio-economic and institutional factors have been shown to be associated with individual happiness and to interact with the happiness effect of pro-social behavior: personality traits (e.g., Furnham and Cheng, 1997;Ruiz, 2005;Demır and Weitekamp, 2007); age (e.g., Blanchflower and Oswald, 2008;Frijters and Beatton, 2012;Wunder et al, 2013;Laaksonen, 2018); health (e.g., Gerdtham and Johannesson, 2001;Graham, 2008;Sabatini, 2014); education (e.g., Gerdtham and Johannesson, 2001;Cuñado and de Gracia, 2012;Nikolaev and Rusakov, 2016); religiosity (e.g., Stark and Maier, 2008;Sahraian et al, 2013;Francis et al, 2017;Frey, 2018); income (e.g., Clark and Oswald, 1996;Frey and Stutzer, 2002;Blanchflower and Oswald, 2004;Boes and Winkelmann, 2010;Powdthavee, 2010); marital status (e.g., Gerdtham and Johannesson, 2001;Stutzer and Frey, 2006); having children (e.g., Cetre et al, 2016); social capital (e.g., Leung et al, 2011;Rodríguez-Pose and von Berlepsch, 2014); unemployment (e.g., Clark and Oswald, 1994;Di Tella et al, 2001;Frey and Stutzer, 2002);inflation (e.g., Di Tella et al, 2001;Frey and Stutzer, 2002); economic and political freedom (e.g., Veenhoven, 2000;Frey and Stutzer, 2002); democratic participation (e.g., Frey andStutzer...…”