Large Blocks of Stock: Prevalence, Size, and Measurement
AbstractLarge blocks of stock play an important role in many studies of corporate governance and finance. Despite this important role, there is no standardized data set for these blocks, and the best available data source, Compact Disclosure, has many mistakes and biases. In this paper, we document these mistakes and show how to fix them. The mistakes and biases tend to increase with the level of reported blockholdings: in firms where Compact Disclosure reports that aggregate blockholdings are greater than 50 percent, these aggregate holdings are incorrect more than half the time and average holdings for these incorrect firms are overstated by almost 30 percentage points. For researchers using uncorrected blockholder data as a dependent variable, these errors will increase the standard error of coefficient estimates but do not appear to cause bias. However, we find that if blockholders are used as an independent variable, economically significant errors- in-variables biases can occur. We demonstrate these biases using a representative analysis of the relationship between firm value and outside blockholders. An online appendix to our paper provides a “clean” data set for our sample firms and time period. For researchers who need to work outside of this sample, we also test the efficacy of alternative (cheaper) fixes to this data problem, and find that truncating or winsorizing the sample can reduce about half of the bias in our representative application.
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Bibliographic InfoPaper provided by Ohio State University, Charles A. Dice Center for Research in Financial Economics in its series Working Paper Series with number 2005-9.
Date of creation: Jan 2005
Date of revision:
Other versions of this item:
- Dlugosz, Jennifer & Fahlenbrach, Rudiger & Gompers, Paul & Metrick, Andrew, 2006. "Large blocks of stock: Prevalence, size, and measurement," Journal of Corporate Finance, Elsevier, vol. 12(3), pages 594-618, June.
- Jennifer Dlugosz & Rudiger Fahlenbrach & Paul Gompers & Andrew Metrick, 2004. "Large Blocks of Stock: Prevalence, Size, and Measurement," NBER Working Papers 10671, National Bureau of Economic Research, Inc.
- G3 - Financial Economics - - Corporate Finance and Governance
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