It’s rare for a court to appoint its own expert in a class action. But Judge Gleeson of the Eastern District of New York is poised to do precisely that in order to help him decide whether to grant final approval to the $7.25 billion proposed class settlement of antitrust claims by retailers challenging Visa’s

Antitrust class actions differ in a number of respects from the ordinary run of consumer class actions. Perhaps most notably, they frequently involve classes made up, not of individual consumers, but of highly sophisticated businesses with potentially enormous sums of money on the line. These class members sometimes take an active role in the litigation,