One of the biggest risks in data work is optimizing for speed over fit. But if a solution doesn’t actually help someone make a better decision, or, worse, leads to a misleading one, it can cause more ...

The full data set from our in-depth investigation into mass shootings.

Pareto analysis states that 80% of a project’s results are due to 20% of the inputs, and 80% of problems can be traced to 20% of the causes.