Bainbridge on Corporations

Bainbridge on Corporations

New Legal Scholarship: Anderson's “The Evolution of the Poison Pill”

A fresh look at corporate law’s most famous “invention”

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Stephen Bainbridge
Nov 02, 2025
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Robert Anderson’s new paper The Evolution of the Poison Pill offers a fascinating empirical examination of one of corporate law’s most significant developments. Using computational analysis of over 3,500 poison pill documents spanning four decades, Anderson challenges the conventional narrative that the poison pill was a singular invention by Martin Lipton of Wachtell Lipton. Instead, he reveals a more complex story of evolution, competition, and policy innovation.

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