PEOPLE WATCH

Hey, It’s a Living: New York Mayor Edward I. Koch, already signed up as a television commentator, is adding newspaper columnist to the growing list of job titles he’ll assume when he leaves office in January. Koch will write a weekly column for the New York Post, the paper announced this week. “I will be even less inhibited as a columnist than I was as mayor,” Koch promised. “The world will be my oyster.” Koch, who will be succeeded by Democrat David Dinkins, has already agreed to teach at New York University and do regular commentaries for local television and radio stations. “Anyone who’s ever covered Ed Koch would have been very surprised to see him pull a General (Douglas) MacArthur and fade away,” said New York Post Editor Jerry Nachman.