By Mark Hulbert
Twitter /zigman2/quotes/203180645/composite TWTR +0.13% investors may be making a mistake by reacting so negatively to Jack Dorsey’s resignation as CEO and his being replaced by a relatively unknown company insider — Parag Agrawal.
The chart below plots Twitter stock’s performance relative to the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.97% since Dorsey’s resignation announcement on the morning of Nov. 29. Since then the stock has lagged the S&P 500. Barron’s quoted a money manager as attributing this lagging performance to “disappointment from Wall Street that an internal successor was chosen” instead of a high-profile outsider.
My suggestion to Wall Street: Read academic research about the importance of the CEO for an organization’s long-term success. My reading of these studies suggests that Wall Street actually should be celebrating that Twitter’s board chose an insider. CEOs who come in from the outside often do a poorer job than lesser-known managers who have worked their way up through the ranks of the corporations they eventually lead — like Agrawal.
This is because a corporation’s internal culture plays a much bigger role in a company’s success or failure than the CEO. Internal candidates like Agrawal are steeped in Twitter’s corporate culture and know how to navigate it. In contrast, CEOs brought in from the outside have no such familiarity, which is why they often are less-effective leaders.
To be sure, a board of directors might want to bring in an outsider in order to change a firm’s internal culture. Unfortunately, in a contest between an outsider CEO and an internal culture, the latter usually wins. Gautam Mukunda , a professor of organizational behavior at Harvard Business School, has found from his research that “most of the CEOs who try to radically transform a company will fail.”
The implication is that Wall Street exaggerates the importance of the CEO. Rakesh Khurana , a colleague of Mukunda’s at Harvard Business School who is a professor of leadership development, told me on the occasion of past CEO shakeups that “large-scale statistical studies have failed to find any direct causal link between CEOs and firm performance.” A corporation’s internal culture “exerts a far greater longer-term influence on the company’s success” than a CEO.
The importance of culture
What is this corporate culture that plays such a predominant role? It’s not easily defined, which is one reason why Wall Street doesn’t pay it as much attention as it deserves. A partial list of what corporate culture includes was provided by a recent study by three finance professors: Gary Gorton and Alexander Zentefis (both at Yale) and Jill Grennan (at Duke) :
Unwritten codes, implicit rules, and regularities in interactions
Identities, self-image, and guiding purpose
Espoused values and evolving norms of behavior
Conventions, customs, and traditions
Symbols, signs, rituals, and group celebrations
Knowledge, discourse, emergent understanding, doctrine, ideology
Memes, jokes, style, and shared meaning