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Publicado en: Documento de trabajo

Intermediary Commissions in a Regulated Market with Heterogeneous Customers

; Pilar Alcalde

Documento de Trabajo IE-PUC, N° 532, 2020.

Abstract: Several studies predict that in markets with intermediation, changes in regulation intended to benefit consumers may have negative consequences for welfare when firms set commissions. We argue that, even if commissions are exogenous, transparent, and paid by customers, policies to diminish intermediaries’ bias may have nontrivial effects on equilibrium outcomes. We provide evidence from a highly regulated retirement market by examining two subsequent policy changes that reduced the commission differential between products. Some of the patterns of the demand side are consistent with biased advice, but others are less intuitive. Our model helps understand these patterns and also predicts the firms’ equilibrium reaction to commission levels. We show that, in many cases, prices move in the opposite direction to the intermediaries’ bias: when intermediaries are cheaper and less biased, more customers follow their advice, making demand less elastic. This change induces firms to increase prices, producing nontrivial effects on welfare.


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