Stephen B. Shepard to Retire from BusinessWeek; Expected to Lead &lt;b&gt;...&lt;/b&gt; NEW YORK, Nov. 29 /PRNewswire-FirstCall/ -- After 20 years leading BusinessWeek magazine -- a tenure defined by editorial excellence, circulation growth and global expansion -- Stephen B. Shepard, Editor-in-Chief, will retire effective April 1, 2005.