No-Bell Prize in the offing
The really ground breaking thing about this paper is..
A bunch of economists decide to study something
Find it's quite hard; so decide to simplify it. ( To get the essence of the system..)
Pick One easy to measure parameter. ( which may well be totally pointless)
Produce a whacking great paper to send to their mates (sorry academic peers..)
The really amazing thing at the end they admit this might not be the only thing that matters..
Guys just take that thought back to your day jobs befor you do any more damage to the rest of us.