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Abstract

IPO underwriters have an incentive to underprice an IPO when they allocate shares to their affiliated funds. We label this conflict of interest “supernepotism” and we analyze its effect on IPO pricing. Using a regression discontinuity design (RDD) on a novel hand-collected dataset, we find that higher allocations to underwriter-affiliated funds cause higher IPO underpricing. Our evidence suggests that supernepotism has monetary costs for issuers.

Published in

Journal of Financial and Quantitative Analysis
François Degeorge, Giuseppe Pratobevera
Volume 60, Issue 5, Pages 2367-2397, August 2025

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