to our knowledge so far there is no source of general population survey data collecting both selfreported 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 eg larger underestimation by hazardous drinkers as this can exist with the measure of body mass index cawley lakdawalla and philipson the proportion of hazardous drinkers is found to vary between recall and diary from to for men and from to for women