The adoption intensity score = (Σ status_weight × binding_multiplier) / 24 × 100, where implemented=3, passed=2, proposed=1, and binding=1.5×, voluntary=1.0×. California (raw 24) sets the maximum.
National projections scale literature effect sizes by the population-weighted average adoption score (34 → factor 0.34). Diminishing returns apply logarithmically after Year 10; economic savings compound 3–5% annually. State projections scale national values by (state score ÷ 34), with economic metrics additionally scaled by population share.
Benchmark studies: Waters et al. 2011 (Cochrane), Tuomilehto et al. 2001 (NEJM), Puska et al. 2009 (North Karelia), Adolphus et al. 2013, Frisvold 2015, Goetzel et al. 2014, Loeppke et al. 2009, McCann et al. 2007 (Lancet).
Roughly 60% of catalogued federal actions are non-binding (study directives, voluntary programs, proposed rules). Only ~40% carry the force of law. The synthetic-dye phase-out relies primarily on voluntary industry commitments; several actions face active litigation.
Key limitations: small-to-large extrapolation, linear scaling of a likely-nonlinear dose-response, attribution against secular trends, variable implementation fidelity, multi-year outcome lags, and no modeled feedback loops. A score of 0 means zero documented activity as of the data cutoff, not necessarily zero activity.