Hi NorthStarInbound, thanks for your response.
By "retiring" i mean deleting. They're old URLs that we'd like to get rid of and just let the new pages stand on their own.
But we would be giving up the authority that those pages have accumulated. The question is, how much authority is at stake? How large of a hit are we going to take? How can we measure this?
Any advice is helpful! Thanks, yael