Andy explained that humans, particularly those who build things, only listen to leading indicators of good news. For example, if a CEO hears that engagement for her application increased an incremental 25 percent beyond the normal growth rate one month, she will be off to the races hiring more engineers to keep up with the impending tidal wave of demand. On the other hand, if engagement decreases 25 percent, she will be equally intense and urgent in explaining it away: “The site was slow that month, there were four holidays, and we made a UI change that caused all the problems. For gosh sakes,
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