Anyone driving state and county roads in Indiana is aware of a trend that the latest population estimates from the U.S. Bureau of the Census indicate‹rural increases are dominating the growth of many counties in the Hoosier state. That's the finding of a report in the January issue of Indiana Business Review Update, a monthly publication of the Indiana Business Research Center at IU's Kelley School of Business. While cities, towns and other incorporated places grew in population by 3 percent between 1990 and 1996, rural or unincorporated areas experienced growth of 9.3 percent. "The advances of rural areas in the 1990s follow a long term pattern of suburban-ization which today some feel is threatening the economic and social viability of both our communities and our rural areas," said Morton J. Marcus, the center's director.