The point that surprised me the most was the study about lower salaries for non-drinkers (-12.8% for men and -25.5% for women). While the study is from 1988 I'm curious how much has changed in the meantime. Although I'm in doubt that the sole reason for this discrepancy is the willingness to drink.

Maybe you earn more in the investigated industries if you are an outgoing "people person". And maybe you are more likely to drink if you are outgoing. It's the old causation/correlation thing. But still interesting.