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α: calibrated so average coauthorship-adjusted count equals average raw count
How marketability affects security prices is one of the most important issues in finance. The authors derive a simple analytical upper bound on the value of marketability using option-pricing theory. They show that discounts for lack of marketability can potentially be large even when the illiquidity period is very short. This analysis also provides a benchmark for assessing the potential costs of exchange rules and regulatory requirements restricting the ability of investors to trade when desired. Furthermore, these results provide new insights into the relation between discounts for lack of marketability and the length of the marketability restriction. Copyright 1995 by American Finance Association.