There is no commonly, by investment advisors as well as theorists accepted answer to the question, whether the risky fraction of an investor's portfolio should depend on his time horizon. For this reason we try to define the decision problem in its most general way and gradually reduce it by...

Crossing the street in front of oncoming vehicles poses serious danger to young children. In this research, we tried to identify children who are particularly prone to making risky crossing decisions. We used simple games involving risk to classify 5- to 6-year-olds as risk takers or risk...