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why do firms go public? - Marriott School

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Jay Ritter became one of the pioneers in IPO research by compiling a database of 2,609<br />

IPOs from 1975-1984. He used a subset of 1,526 of these IPOs that were listed on CRSP for his<br />

seminal 1991 Journal of Finance article (Ritter (1991)). Professor Ritter now offers <strong>public</strong><br />

access to the complete database on his webpage.<br />

In the mid to late 90’s, Compact Disc Disclosure offered IPO prospectuses (SEC S-1<br />

<strong>do</strong>cuments) for researchers to scour. Around the same time, Securities Data Company (SDC)<br />

was marketing its New Issues database in DOS-style format which streamed over the internet.<br />

The advent and expansion of SDC provided a catalyst for IPO researchers. Although errors have<br />

been <strong>do</strong>cumented in SDC along the way by scholars such as Alexander Ljungqvist and Jay Ritter<br />

(corrections available on their respective webpages), the easy access to IPO data via SDC has<br />

been a boon to researchers. Since SDC, various other data providers continue to provide richer<br />

and richer data on IPOs.<br />

The existence of these computer-readable data opened up a large literature testing IPO in<br />

the three IPO phenomena of underpricing, long-run returns, and hot markets along with newer<br />

discoveries as well. As a side note, the availability of IPO data also increased competition for new<br />

anomalies. For example, at one point in time, at least five teams of researchers were all working on<br />

the lockup expiry effect simultaneously (earliest known working paper dates: Brau, Carter,<br />

Christophe, and Key (1999), Brav and Gompers (1999), Bradley, Jordan, Roten, and Yi (1999),<br />

Field and Hanka (1999), Ofek and Richardson (2000)). Field and Hanka won the lockup expiry<br />

race with their article that was published in the Journal of Finance (Field and Hanka (2001)). The<br />

Bradley team focused their paper on VC-effects in lockups and published their paper in the<br />

Journal of Financial Research (Bradley et al. (2001)). Brav and Gompers focused on the front-end<br />

of the lockup paper and published their revised paper in the Review of Financial Studies (Brav and<br />

Gompers (2003)). The Brau et al. paper on lockup expiry was published in Managerial Finance<br />

21

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