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In the United States, federal judges occupy weighty positions. They interpret the Constitution, define people's rights and liberties, and apply laws and regulations to myriad cases. They also are older than ever. In 2023, the median age of a federal judge reached 70 for the first time. Nearly one-third of federal judges exceeded the age of 75. And ten percent were 85 years or older. The federal judiciary has become a graying judiciary. Recent advances in neuroscience show that cognitive aging leads to processing speed delays, a decline in executive functioning skills like reasoning and memory, and a greater reliance on cognitive shortcuts. Judges are not immune from these effects. Simply put, cognitive aging influences all people. Judges are people. And so cognitive aging must influence them. In Cognitive Aging and the Federal Circuit Courts: How Senescence Influences the Law and Judges, a distinguished team of authors investigates how cognitive aging influences federal circuit court judges. The first-of-their-kind results show that as judges age, they require more time to craft their opinions; they rely more on cognitive shortcuts; their opinions become less complex; they increasingly rely on others to help them write opinions; and their legal influence on panels wanes just as their susceptibility to persuasion increases. These results are sure to transform broad debates about institutional reform.

The U.S. Supreme Court, with its controlled, highly institutionalized decision-making practices, provides an ideal environment for studying coalition formation. The process begins during the oral argument stage, which provides the justices with their first opportunity to hear one another's attitudes and concerns specific to a case. This information gathering allows them eventually to form a coalition. In order to uncover the workings of this process, the authors analyze oral argument transcripts from every case decided from 1998 through 2007 as well as the complete collection of notes kept during oral arguments by Justice Lewis F. Powell and Justice Harry A. Blackmun. Both justices clearly monitored their fellow justices'participation in the discussion and used their observations to craft opinions their colleagues would be likely to support. This study represents a major step forward in the understanding of coalition formation, which is a crucial aspect of many areas of political debate and decision making.