Defense Calls First Witness in Hedge Fund Boss Inside Trading Trial

``The expert witness is Gregg Jarrell, professor of finance and economics at the Simon Business School at the University of Rochester. He worked under the Reagan Administration as chief economist of the U.S. Securities and Exchange Commission. Jarrell is expected to testify that the information Rajaratnam allegedly used to make trades wasn't significant, and if the government can't show the information was important to other investors, it could lose its case.''