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Choi, S., Goyal, S. and Moisan, F.

Brokerage Rents and Intermediation Networks

Proceedings of the National Academy of Sciences of the United States of America

Vol. 120 no. 28 (2023)

Abstract: This paper provides experimental evidence on the economic determinants of intermediation networks by considering two pricing rules – respectively criticality and betweenness – and three group sizes of subjects – 10, 50 and 100 subjects. We find that when brokerage benefits accrue only to traders who lie on all paths of intermediation, stable networks involve interconnected cycles, and trading path lengths grow while linking and payoff inequality remain modest as the number of traders grows. By contrast, when brokerage benefits are equally distributed among traders on the shortest paths, stable networks contain a few hubs that provide the vast majority of links, and trading path lengths remain unchanged while linking and payoff inequality explode as the number of traders grows.

Keywords: Brokerage, Experiment, network formation

JEL Codes: C92, D83, D85, Z13

Author links: Sanjeev Goyal  

Publisher's Link:

Keynes Fund Project(s):
Experiments on Financial Networks (JHLB)  
Experiments on 'Networked Markets' (JHLR)  

Theme: networks