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http://www.prb.org/pdf/populationlivelyintro.pdf (pdf: 259KB)
In the new 4th edition of this Population Bulletin, author Joseph McFalls discusses the basic forces of demographic change — fertility, mortality, and migration — and common assessment measures. Also covered are how these three forces affect a population's size and growth rate, and how population projections are calculated; common demographic variables such as age, sex, and race/ethnicity; and issues and problems associated with population growth. (December 2003)