Jeremy Siegel, the Ivy League economist and stock market guru, who hails from the Wharton School of Business at the University of Pennsylvania, has bold predictions for the stock market this year. In a conference call organized by WisdomTree Investments Thursday evening, the so-called "Wizard of Wharton" said the S&P 500 could top 1,700 this year, rallying nearly 20%, with the U.S. economy growing north of 3%. "I think this year will be stronger