Choi, S., Goyal, S. and Moisan, F.
Brokerage
WP Number: 2002
Abstract: Dominant intermediaries are a defining feature of the modern economy. This paper studies the mechanisms that give rise to trading networks with a dominant intermediary.
Trades between actors require a direct link or a path that involves intermediaries. Links are costly. Efficiency therefore pushes towards connected networks with few links: this set includes the hub-spoke network, the cycle network and their variants. The hub-spoke network exhibits extreme inequality, while the cycle network yields equal payoffs for all traders.
We conduct a large scale experiment on link formation among traders; the game takes place in continuous time and allows for asynchronous choices. The main finding is that the pricing protocol - the rule dividing the surplus between traders and intermediaries - determines which of these two networks arises.
JEL Codes: C92 D83 D85 Z13
Author links: Sanjeev Goyal
PDF: wp2002.pdf 
Open Access Link: 10.17863/CAM.52425
Keynes Fund Project(s):
Experiments on Financial Networks (JHLB)
Experiments on 'Networked Markets' (JHLR)
