Narrator: This is Science Today. Drinking patterns can be affected by the year a person was born. Raul Caetano, director of the University of California, Berkeley's Alcohol Research Group found that drinking habits of 18 to 29 year olds males may differ depending on what time period they are from.
Caetano: We know for instance that cohorts of men that were born during Prohibition, which happened during the twenties in the United States, do drink less than other cohorts, just because they were born and grew up at a time when alcohol was available, but was illicit.
Narrator: In a recent study, Caetano found heavy drinking among young white men - a pattern the last 30 years - dropped dramatically.
Caetano: And it's possible that the men who are 18 to 29 now are in a different birth cohort and therefore, they will drink less throughout their lives.
Narrator: If this is so, Caetano says we should see a drop in rate in that particular group within the next ten years. For Science Today, I'm Larissa Branin.