There was a recent study which showed that people who drink earn more than people who don't.
http://www.mercurynews.com/mld/mercu...l/15516012.htm
I wonder if people who talk to their seatmates earn more than people who don't.
Hard to say. On one hand, you have those with social skills who use the chats to network and make new business contacts. Aside from the fact that people probably like extroverts more than introverts, so these folks are likely to have more friends/contacts anyway.
On the other hand, you have chatty grandmas.