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The Supreme Court as an Opinion Leader

Evidence for the Supreme Court's legitimacy-conferring role is measured by examining shifts in pre- and postdecision public opinions polls. A study of 18 poll shifts since the 1930s indicates that the average pre- to postdecision poll shift is virtually zero. Under limited circumstances, however, larger poll shifts toward the Court's position do occur, especially when the Court makes liberal, activist decisions and when a time-lag variable is allowed for.