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The Paul Douglas Institute
State Preemption Evidence Dashboard
PDI Senior Researcher David Whyman collaborated with the Urban Institute to produce an interactive dashboard on research findings on state preemption policies across 13 issue areas. The dashboard organizes evidence from over 350 studies, allowing users to visualize evidence
divided by methodology, quality, and finding (whether the policy's impacts were positive or negative).
You can interact with the embedded dashboard below, or visit its