Dave Pettit of The Wall Street Journal writes a daily column that appears inside the first page of the journal's Money & Investment section. If the headlines of Mr. Pettit's daily column are any accurate record of economic concerns and current issues in the business world, the late weeks of March and the early weeks of April in 1994 were intensely concerned with interest rates. To quote, "Industrials Edge Up 4.32 Points Amid Caution on Interest Rates," and "Industrials Track On 13.53 Points Despite Interest-Rate Concerns." Why such a concer ....