Berkeley Law assistant professor Justin McCrary is one of three economists to conduct a statistical analysis for a Wall Street Journal study of the high-school Regents test, a prerequisite for graduating in New York. They estimated that 3 to 5 percent of students who received passing grades for the main Regents exams in June 2009 actually failed the tests. In New York City, the figure jumped to between 5 and 10 percent. McCrary and his colleagues have published a paper on its findings, which heighten suspicion that some high-school teachers—who score their own students’ tests—push borderline scores into the passing category.