Policy implementation is usually studied at the micro level by testing the short-term effects of a specific policy on the behavior of government actors and policy outcomes. This study adopts an alternative approach by examining macro implementation-the cumulative effect of aggregate public policies over time. I employ a variety of methodological techniques to test the influence of macro criminal justice policy on new admissions to federal prison via three mediators: case filings by federal prosecutors, conviction rates in federal district courts, and plea bargaining behavior. I find that cumulative Supreme Court rulings influence the incarceration rate by altering conviction rates in district courts; however, I find only mixed evidence of congressional and presidential influence. The results suggest that U.S. macro policy influences bureaucratic outputs by altering the behavior of subordinate policy implementers; however, the Supreme Court may enjoy an advantage in shaping criminal justice policy.