This thesis contains four studies in applied microeconomics. The first chapter studies the question of how risk and religiosity are related. The second chapter is a field experiment with a gym, with a policy intervention to help people go more often to the gym. The third chapter examines how the...

The present thesis examines if and to what extent microeconomic theory can explain the observable behavior of individuals in competitive environments. On the basis of self-compiled datasets from (professional) sports competitions as well as a widely broadcasted TV quiz-show two research...