Unit 2: Information failure: How many units in a glass of wine?

This BBC clip and related article outlines the problem of information failure when deciding how much you should drink

http://news.bbc.co.uk/1/hi/health/7407747.stm video

http://news.bbc.co.uk/1/hi/health/7399192.stm aticle including 2 of the public information videos

a) If there is information failure, what sort of market failure does the alcohol market represent?
b) To what extent do you believe the public information campaign is likely to reduce the market failure?