The graph is an event-study chart titled, “Recreational Marijuana Legalization and Maternal Substance Abuse.” The y-axis, which plots the difference in share of maternal hospitalizations between states that did and did not implement recreational marijuana laws (RMLs), ranges from -0.8 to 0.8 percentage points, and the x-axis ranges from 11 years before to 11 years after implementation. Estimates for tobacco use, opioid use, and marijuana use disorder are shown. 11 years after implementation, estimates for tobacco use, opioid use, and marijuana use disorder are -0.44, 0.18, and 0.49 percentage points, respectively. Source: Andersen M, Bryan S, Slusky D. NBER Working Paper 28058