Locus of control and investment in risky assets / Nicolas Salamanca (Melbourne Institute, ARC Life Course Centre, ROA, Maastricht University and IZA), Andries de Grip (ROA, Maastricht University, IZA and Netspar), Didier Fouarge (ROA, Maastricht University, IZA and Netspar), Raymond Montizaan (ROA, Maastricht University, IZA and Netspar) ; IZA, Institute of Labor Economics