Some years ago, I wrote an article entitled Why a Board? Group Decisionmaking in Corporate Governance. Vanderbilt Law Review, Vol. 55, pp. 1-55, 2002. Available at SSRN: http://ssrn.com/abstract=266683. In it, I argued that:
The default statutory model of corporate governance contemplates not a single hierarch but rather a multi-member body that acts collegially. Why? This article reviews evidence that group decisionmaking is often preferable to that of individuals, focusing on evidence that groups are particularly likely to be more effective decisionmakers in settings analogous to those in which boards operate. Most of this evidence comes not from neo-classical economics, but from the behavioral sciences. In particular, cognitive psychology has a long-standing tradition of studying individual versus group decisionmaking. This article contends that behavioral research, taken together with various strands of new institutional economics, sheds considerable light on the role of the board of directors. In addition, the analysis has implications for several sub-regimes within corporate law. Are those sub-regimes well-designed to encourage optimal board behavior? Two such sub-regimes are surveyed here: First, the seemingly formalistic rules governing board decisionmaking processes turn out to make considerable sense in light of the experimental data on group decisionmaking. Second, the adverse consequences of judicial review for effective team functioning turns out to be a partial explanation for the business judgment rule.
Ever since then, I've kept an eye out for interesting new research on group versus individual decision making. The latest to catch my eye is When Do Groups Perform Better than Individuals? A Company Takeover Experiment, which unlike many relevant studies has direct application to corporate governance:
It is still an open question when groups will perform better than individuals in intellectual tasks. We report that in a company takeover experiment, groups placed better bids than individuals and substantially reduced the winner’s curse. This improvement was mostly due to peer pressure over the minority opinion and to group learning. Learning took place from interacting and negotiating consensus with others, not simply from observing their bids. When there was disagreement within a group, what prevailed was not the best proposal but the one of the majority. Groups underperformed with respect to a “truth wins” benchmark although they outperformed individuals deciding in isolation.
Very interesting and very pertinent to those of us who try to figure out how to make boards more effective by improving group decision making processes.