A single Supreme Court ruling can shift measured behavior nationwide within a year.

Evidence

Nevertheless, Roe had immediate effects: in the year it was decided, legal abortions rose from 587,600 to 745,400, an increase of 27 percent.?° In the years following, legal abortions in the United States rose to more than 1. — G. Alan Tarr, Judicial Process and Judicial…, 3117

Categorization

• SEED: Angle: quantify how fast court decisions actually change behavior versus how fast politics responds.