Posner had a significant influence on the Microsoft antitrust trial back in 1999-2001, both his legal thinking before the trial and being appointed by the judge in that trial to serve (ultimately unsuccessfully) as a mediator amidst the trial.
Posner did more than anyone else to consign law to a branch of economics, specifically economics as understood by the Chicago School.
Age 87. I had to read some stuff by him a long time ago.
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Posner had a significant influence on the Microsoft antitrust trial back in 1999-2001, both his legal thinking before the trial and being appointed by the judge in that trial to serve (ultimately unsuccessfully) as a mediator amidst the trial.