Population projections are "what if" computational exercises. Given selected assumptions about future trends in fertility, mortality, and migration, population trends can be projected. Government and business planners need this information, and they also require enough time to put facilities in place to meet future needs. Everyone benefits from a…

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…