Husband's unemployment and wife's labor supply : the added worker effect across Europe / Julia Bredtmann (RWI, IZA and CReAM), Sebastian Otten (CReAM, University College London and RWI), Christian Rulff (Ruhr University Bochum and RWI) ; IZA Institute of Labor Economics. Bonn, Germany : IZA Institute of Labor Economics, October 2017