Diffusion Timeline

Early Adopters: States that first introduce specific provisions often serve as "policy laboratories" and may influence later adopters. Early adopters typically face higher political costs and uncertainty.

Diffusion Speed: Faster diffusion (shorter time periods) suggests strong policy consensus or external pressure. Slower diffusion may indicate contested provisions or state-specific adaptation.

Temporal Gaps: Long gaps between adoptions may indicate policy learning periods, changes in political context, or the need for evidence from early adopters before others follow.