The stability of personality traits in adolescence and young adulthood

Models of economic decision-making usually assume that personality is stable over time. We assess the validity of this assumption over an eight-year time frame in adolescence and young adulthood using nationally representative panel data from Australia. Our study shows that unconditional mean-level changes in personality traits are small—with the exception of conscientiousness which increases by 0.38 SD—because most individuals do not change their scores in a statistically reliable way during adolescence and young adulthood, or changes occur in equal proportions in opposite directions. Controlling for systematic panel attrition and multiple hypothesis testing, we demonstrate that personality traits do not systematically respond to the majority of common one-off family-, income-, and health-related shocks. However, a small number of life events—marriage, family members detained in jail, leaving the workforce and long-term health problems—are associated with subsequent changes in personality. In particular, youth who experience long-term health problems including bodily pain increase their external locus of control by 0.5–0.9 SD, an economically meaningful change when expressed in terms of hourly wage penalty.     

Changing attitudes to risk at older ages: The role of health and other life events

This paper investigates risk attitudes at older ages in 14 European countries. Older individuals report lower willingness to take risks in all countries. Using panel data we are able to show that this relationship between financial risk attitudes and age is not due to cohort effects or selective mortality. We also show that key mechanisms driving this change with age are health changes and other life events – in our preferred specification around half of the overall evolution of risk attitudes with age can be explained by health shocks, retirement, and widowhood or marital change that occur increasingly frequently as individuals age. These life-events are a particularly important explanation of the evolution of risk attitudes for women.