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by mathattack
3351 days ago
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Yes - people start optimizing on the metric, and metrics where correlation doesn't imply causation degrade. The other thing I've seen is competitive pressures degrade metrics. If "A customer using us for X is 95% not likely to churn" is true in 2015, competitive pressure will push it to 85% in 2016, and 75% in 2017. |
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