This variable will be checked if the case was heard by a three-judge federal district court (occasionally called “as specially constituted district court”). Beginning in the early 1900s, Congress required three-judge district courts to hear certain kinds of cases. More modern-day legislation has reduced the kinds of lawsuits that must be heard by such a court. As a result, the frequency is less for the Burger Court than for the Warren Court, and all but nonexistent for the Rehnquist and Roberts Courts.