The Wisdom of Crowds

One key to this approach is a system that encourages, and funds, speculative ideas even though they have only slim possibilities of success. Even more important, though, is diversity—not in a sociological sense, but rather in a conceptual and cognitive sense. You want diversity among the entrepreneurs who are coming up with the ideas, so you end up

The fundamental problem with an information cascade is that after a certain point it becomes rational for people to stop paying attention to their own knowledge—their private information—and to start looking instead at the actions of others and imitate them. (If everyone has the same likelihood of making the right choice, and everyone before you ha

What do we mean by “decentralization,” anyway? It’s a capacious term, and in the past few years it’s been tossed around more freely than ever. Flocks of birds, free-market economies, cities, peer-to-peer computer networks: these are all considered examples of decentralization. Yet so, too, in other contexts, are the American public-school system an

This seems like an eccentric conclusion, and it is. It just happens to be true. The legendary organizational theorist James G. March, in fact, put it like this: “The development of knowledge may depend on maintaining an influx of the naïve and the ignorant, and . . . competitive victory does not reliably go to the properly educated.” The reason, Ma

On teams or in organizations, by contrast, cognitive diversity needs to be actively selected, and it’s important to do so because in small groups it’s easy for a few biased individuals to exert undue influence and skew the group’s collective decision.

Independence is important to intelligent decision making for two reasons. First, it keeps the mistakes that people make from becoming correlated. Errors in individual judgment won’t wreck the group’s collective judgment as long as those errors aren’t systematically pointing in the same direction. One of the quickest ways to make people’s judgments

Decentralization’s great strength is that it encourages independence and specialization on the one hand while still allowing people to coordinate their activities and solve difficult problems on the other. Decentralization’s great weakness is that there’s no guarantee that valuable information which is uncovered in one part of the system will find

In other words, if most decisions to adopt new technologies or social norms are driven by cascades, there is no reason to think that the decisions we make are, on average, good ones. Collective decisions are most likely to be good ones when they’re made by people with diverse opinions reaching independent conclusions, relying primarily on their pri

The variety of possible funding sources encouraged a variety of technological approaches.