The Data Detective: Ten Easy Rules to Make Sense of Statistics

by Tim Harford

This book has argued that it is possible to gather and to analyze numbers in ways that help us understand the world. But it has also argued that very often we make mistakes not because the data aren’t available, but because we refuse to accept what they are telling us. For Irving Fisher, and for many others, the refusal to accept the data was rooted in a refusal to acknowledge that the world had changed. One of Fisher’s rivals, an entrepreneurial forecaster named Roger Babson, explained (not without sympathy) that while Fisher was “one of the greatest economists in the world today and a most useful and unselfish citizen,” he had failed as a forecaster because “he thinks the world is ruled by figures instead of feelings.”21