Preferencing, Internalization of Order Flow, and Tacit Collusion: Evidence from Experiments

Abstract
This paper examines preferencing arrangements and tacit collusion in laboratory asset markets. In the experiments, dealers may internalize by matching the best quote or by passing orders to the dealer posting the best quote. Although some markets were highly competitive, several markets reached a collusive equilibrium with wide spreads and near complete internalization of order flow. The paper further examines the role of market transparency and passed order flow on quote-setting behavior and suggests that these affect the mechanism leading to tacitly collusive equilibria.

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