Matt Kahn (currently ranked #6 in the 1993 cohort ... not bad but it wouldn't get you into the College Football Playoff):
REPEC's performance metrics turn everyone in the profession into a single scalar value. Here is the current ranking of the world's class of 1993. I am eagerly waiting for my retroactive Restud Tour Invite! ...
REPEC Claims that I am an environmental economist and an urban economist. I see that my rank in environmental economics is #12 in the world and my urban economics rank is #30 in the world (that strikes me as a pinch low).
Go here to see this month's RePEc rankings via greeneconomics.blogspot.com.