Obesity: the links with age and socioeconomic status

Christopher Ruhm of the University of North Carolina at Greensboro talks to Romesh Vaitilingam about his work with Charles Baum, which analyses data from the US National Longitudinal Survey of Youth to explore how body weight and obesity change with age and how that relates to socioeconomic status. The interview was recorded at the Centre for Market and Public Organisation in Bristol (UK) in May 2009.