Report of a Federal Judicial Center study of summary judgment practice in six federal district courts during six time periods over twenty-five years (1975-2000), to determine whether summary judgment activity has increased over time and to what extent changes in summary judgment practice are due to the 1986 Supreme Court trilogy of summary judgment cases. For a 2-page summary of this report see FJC Research Brief, No. 2: Trends in Summary Judgment Practice: 1975-2000.