To our knowledge, so far there is no source of general population survey data collecting both self-reported and measured alcohol intake, which would permit to assess underreporting bias at the individual level. In particular, it would be of interest to analyse differences across population groups in the size of underreporting bias (e.g. larger underestimation by hazardous drinkers) as this can exist with the measure of Body Mass Index (Cawley, 2000; Lakdawalla and Philipson, 2002). The proportion of hazardous drinkers is found to vary between recall and diary from 21% to 35% for men and from 6% to 15% for women.