Expert Political Judgment

By Philip E. Tetlock

Categories: Politics & Social Sciences

In this 2005 book, psychologist Philip E. Tetlock asks how good experts are at predicting political events, and how we can know. Tetlock compares experts' forecasts with those of informed amateurs and simple extrapolation, and finds that specialists often do little better and are rarely held accountable. Using Isaiah Berlin's contrast between foxes and hedgehogs, he argues that foxes, who draw on many ideas and adapt as events change, forecast better than hedgehogs, who rely on one big idea.

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