I thought I had read this study just recently. They went into the cross over between the two lifts and concluded that there was very little carryover so both needed to be trained. Can't remember if they took into account PLing gear or not.
It was in a recent edition of the J of St and Cond Research.
This is what I thought I'm gonna find in this thread:
Ben, I'm disappointed.
Rippetoe wrote about it briefly in Starting Strength. He states that while the deadlift takes a lot of leg work, it doesn't require the amount of activation that the squat needs because of the depth differences. And here are some diagrams cause pictures are fun and I'm pretty sure it's all you powerlifter types can understand.
True, he isn't a scientist, but he does have enough "study" in the field. I think we could say that he has enough knowledge on the subject so that when he puts things into published books he isn't just "taking a stab at it."
But we are talking about the same point here anyhow. Both lifts rule, and they should both be done.
Oh also... I haven't read the original article yet...