Discusses Professor Robbins' ... "critique ... in The Tulane Law Review in an article by Ira P. Robbins, a law professor at American University. It was called “Hiding Behind the Cloak of Invisibility,” and it considered “per curiam” opinions, ones issued “by the court” without indication of authorship. “In the first six years of Chief Justice Roberts’s tenure,” Professor Robbins wrote, “almost 9 percent of the court’s full opinions were per curiams.”"