Gender identity, norms, and happiness / Natalia Danzer (Freie Universität Berlin, Berlin School of Economics, ifo Institute, CESifo, IZA and RF Berlin), Rachel E. Kranton (Duke University), Piotr Pawel Larysz (Freie Universität Berlin and WZB), Claudia Senik (Sorbonne University, Paris School of Economics, IUF and IZA) ; IZA Institute of Labor Economics