Lou's comments in the Met's thread made me think of this and I wanted to hear your opinions because I can't make up my mind.

Is sacrifice bunting really worth it to move a runner into scoring position? I hear arguments for both. I've always believed it was a smart thing to do, but I've been hearing more and more arguments that it's actually less productive to give up an out to move a runner up one base. Supposedly there is data to prove this, but I've never seen it or heard where to find it. Is there any proof one way or the other?