Three states--California, Texas, and Florida--currently account for almost one-fourth of all the country's nonfarm jobs. The total number of jobs in these three states exceeds the total employment in 30 other states put together. These economic changes have had a very direct effect on the geographic distribution of the country's population, which is reflected in the large migrations to these states that have occurred. According to projections, this migration should continue through the year 2000 so that these states will continue to experience population increases at the expense of those states that thrived under a manufacturing-based economy. It is important to remember, however, that the country's population distribution has the potential to change dramatically again as America continues to move from a goods-producing to a service-producing economy. The intensive marketing campaigns that are currently being waged by many cities, states, and regions to attract new service-oriented business has the potential to alter future migration patterns dramatically. Another important factor in the population picture is the changing political power structure as areas gain or lose population, thus gaining or losing electoral votes. (MN)