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- Fall 2024
- Article
Redemption Mechanisms in Poison Pills: Evidence on Pill Design and Law Firm Effects
By: Olivier Baum and Guhan Subramanian
We present the first evidence on the incidence of “trip wire” versus “last look” poison pills. Using a hand-collected data set of 130 poison pills implemented and/or amended between January 1, 2020 and March 31, 2023, we find that pills are almost evenly divided... View Details
- February 2023 (Revised March 2023)
- Case
Twitter Turnaround and Elon Musk
By: Andy Wu and Goran Calic
Late afternoon on Friday, October 27th, 2022, Elon Musk was the center of attention at Twitter’s San Francisco headquarters. The night before, Musk officially took the company private and became Twitter’s majority shareholder, finally ending a months-long acquisition... View Details
- November 2022
- Case
Ajax Health: A New Model for Medical Technology Innovation
By: Regina E. Herzlinger and Ben Creo
This case teaches key success factors for both startup and established MedTech firms. It examines how to structure a firm to maximize innovation and financial returns with organizational structures that better align the incentives for the different skill sets... View Details
- October 2021
- Background Note
How to Write an Action-Planning Memo
By: Ryan Raffaelli and Akshaya Varghese
The ability to communicate an action plan through writing is essential for advancing ideas, earning credibility, and garnering support. Research has shown that leaders who write formal plans are more likely to execute successfully—written plans help members of an... View Details
- 2021
- Book
The Emergence of Charismatic Business Leadership
In The Emergence of Charismatic Business Leadership is an examination of how the role of the business leader in the U.S. has changed from World War II to the present. A small number of high-profile individuals have transformed the face of modern-day leadership,... View Details
- May 2021 (Revised September 2021)
- Case
Accounting for Bitcoin at Tesla
By: Charles C.Y. Wang and Siyu Zhang
On February 8, 2021, Tesla revealed, through its 10-K filing to the Securities and Exchange Commission (SEC), that it had purchased $1.5 billion of Bitcoin, totaling 7.5% of the company’s cash, and that it planned to accept payments in the cryptocurrency soon. These... View Details
- 2020
- Working Paper
Demystifying the Math of the Coronavirus
By: Elon Kohlberg and Abraham Neyman
We provide an elementary mathematical description of the spread of the coronavirus. We explain two fundamental relationships: How the rate of growth in new infections is determined by the “effective reproductive number” and how the effective reproductive number is... View Details
- April 2020 (Revised October 2021)
- Case
SpaceX, Economies of Scale, and a Revolution in Space Access
By: Matthew C. Weinzierl, Kylie Lucas and Mehak Sarang
From the time he transformed the world of online banking, Elon Musk established himself as a bold innovator. After selling X.com to PayPal in 2002, he founded a series of revolutionary start-ups, starting with Space Exploration Technologies (SpaceX). Hoping to "make... View Details
- November 2018 (Revised January 2020)
- Case
Tesla, Inc. in 2018
By: Siko Sikochi, Suraj Srinivasan and Quinn Pitcher
On August 7, 2018 Elon Musk, Chairman and CEO of Tesla tweeted that he was considering taking Tesla private and had secured funding. Weeks went by without details about a deal and speculation grew that Musk had misled investors. He soon abandoned the idea, but the... View Details
- Editorial
Elon Musk's Unusual Compensation Plan Isn't Really About Compensation at All
By: George Serafeim
Earlier this year, Tesla shareholders approved likely the largest compensation package ever awarded to a CEO—for a CEO who clearly doesn’t need the money. Elon Musk is already incredibly rich and also doesn’t seem particularly motivated by further wealth. So why do it?... View Details
- Article
Games of Threats
By: Elon Kohlberg and Abraham Neyman
A game of threats on a finite set of players, N, is a function d that assigns a real number to any coalition, S ⊆ N, such that d(S) = -d(N\S). A game of threats is not necessarily a coalitional game as it may fail to satisfy the condition d(Ø) = 0. We show that analogs... View Details
- December 2017 (Revised November 2018)
- Case
Tesla: Financing Growth
By: Stuart C. Gilson and Sarah L. Abbott
The case analyzes the equity market value of Tesla Motors, the electric car company founded and led by Elon Musk. Wall Street analysts are wildly divided on the future growth prospects for this company, and analysts’ one year share price targets range from $160 to... View Details
- 2017
- Working Paper
Cooperative Strategic Games
By: Elon Kohlberg and Abraham Neyman
We examine a solution concept, called the “value," for n-person strategic games. In applications, the value provides an a-priori assessment of the monetary worth of a player's position in a strategic game, comprising not only the player's contribution to the total... View Details
Keywords: Game Theory
- November 2016 (Revised May 2017)
- Case
Hyperloop One
This case explores the attempt of Shervin Pishevar, a prominent Silicon Valley investor, to shepherd hyperloop, a futuristic pod-in-tube transportation technology, from concept to transformative reality via Hyperloop One and Sherpa Capital, both companies he... View Details
- October 2016
- Case
Elon Musk: Balancing Purpose and Risk
By: Shikhar Ghosh and Sarah Mehta
The case is used to illustrate the place of ‘Purpose’ versus financial risk and returns in a founder’s objectives. It also addresses personal risk profile of different founders, and when paired with the Risk Tolerance Exercise, it enables evaluating one’s own appetite... View Details
- 2015
- Working Paper
The Cooperative Solution of Stochastic Games
By: Elon Kohlberg and Abraham Neyman
Building on the work of Nash, Harsanyi, and Shapley, we define a cooperative solution for strategic games that takes account of both the competitive and the cooperative aspects of such games. We prove existence in the general (NTU) case and uniqueness in the TU... View Details
- 2014
- Working Paper
The NTU-Value of Stochastic Games
By: Elon Kohlberg and Abraham Neyman
Since the seminal paper of Shapley, the theory of stochastic games has been developed in many different directions. However, there has been practically no work on the interplay between stochastic games and cooperative game theory. Our purpose here is to make a first... View Details
- 2007
- Working Paper
Correlated Equilibrium and Nash Equilibrium as an Observer's Assessment of the Game
By: John Hillas, Elon Kohlberg and John W. Pratt
Noncooperative games are examined from the point of view of an outside observer who believes that the players are rational and that they know at least as much as the observer. The observer is assumed to be able to observe many instances of the play of the game; these... View Details