While there is now something of a consensus in the literature on the economics of happiness that income comparisons to others help determine subjective wellbeing, debate continues over the relative importance of own and reference-group income, in particular in research on the Easterlin paradox....

Many years of concerted policy effort in Western countries has not prevented young people from experimenting with cigarettes, alcohol and marijuana. One potential explanation is that social interactions make consumption "sticky". We use detailed panel data from the Add Health survey to examine...