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320 pages, Hardcover
First published January 1, 2014
The idea of a collective intelligence that develops within communities is an old one; indeed, it is embedded in the English language. Consider the word "kith," familiar to modern English speakers from the phrase "kith and kin." Derived from old English and old German words for knowledge, kith refers to a more or less cohesive group with common beliefs and customs. These are also the roots for "couth," which means possessing a high degree of sophistication, as well as its more familiar counterpart, "uncouth." Thus, our kith is the circle of peers (not just friends) from whom we learn the "correct" habits of action…. We learn common sense almost automatically, by observing and then copying the common behaviors of our peers.The whole is presented with a great deal of confidence, and I am thus cowed into thinking he may actually know what he's talking about. That said, I found this book extremely slow going and am not sure I come away from it any better enlightened. Manipulations of statistical models aside, Pentland is not the best communicator.
In the first experiment, home owners received social feedback on how much electricity they used relative to the average person. When the comparison was between the home owner and all other people in their country, virtually no savings resulted; people behaved the same. When the comparison was between them and people in their neighborhood, however, things worked better, showing that how closely they identified with the people in the comparison group mattered. This is a social network effect: Identification with a group of people increases both trust of group members and the social pressure that the group can exert.All praise social physics? I wasn't fully persuaded by this example. Another explanation for the difference could be that people receiving the local comparison found the feedback more immediately relevant to them than data from a more distant and less personal environment. In other words, rather than indicating a social network effect per se, the campaign just showed that like a polished mirror, feedback works better the more accurately it appears to reflect its subject.
The influence model breaks this overall "company state" into the influence each person c has on a particular other person c'... where the influence matrix, R^c', ^c, captures the influence strength of person c over c' and describes how influence spreads through the company's social network. The number of parameters in this model grows relatively slowly with increasing numbers of people and their internal states, making it easy to mathematically model "live" data and use it in real-time applications. Practically, this means we can determine the influence model parameters -- influence, states, etc. -- without knowing the social ties or learned behaviors beforehand by using an expectation maximization algorithm…. For almost all of the examples in this book, including the role of social influence on political views, purchasing behavior, and health choices, as well as productivity in small groups, departments within companies, and entire cities, we find that using measures of the amount of social interaction -- both direct and indirect -- in order to estimate social influence produces accurate estimates of future behavior. (pages 82-3)Say what now? Leaving aside the details of Pentland's model, if I read that last sentence correctly, it would seem that he expects to move from general principles of the sort that lend greater post hoc understanding to specific behavioral predictions of the sort that might be deliberately manipulated. That's surely the holy grail of public policy, but if that's what he intends to pull off, I'm at a loss to find any place where this assertion is clearly demonstrated or exemplified in his book.
[T]he most important generator of city data is a familiar tool: the ubiquitous mobile phone. These devices are, in effect, personal sensing devices that are becoming more powerful and more sophisticated with each product iteration…. [W]e can… gauge the mood of a crowd by analyzing the digital chatter…. Consumers are also beginning to make purchases simply by scanning items with their phones, thereby adding financial and product choice information to [real-time captures of biometric data]. (page 138)What's in *your* wallet? Clearly the ability to undetectably shape human behavior at any scale is a power that can be used for good or ill, the difference being a mere matter of perspective. Pentland would like such godlike omniscience to be used beneficently, so having opened what he calls the "Promethean Fire" of digital transparency, it should be no surprise that he feels a concomitant burden to promote some norms. He advocates for an international treaty that would require all the various data streams that form the smartphone's inherent human-to-internet interface be anonymized in the aggregate, made universally accessible in open source repositories, while somehow being personally accessible, readable, and controllable by individuals (in that all uses must be opt-in and any personal information could be personally destroyed).