Social and Behavioral Sciences Commons^™

A Longitudinal Approach To Great Plains Migration, John C. Hudson

Great Plains Quarterly

Students of population and regional studies are familiar with the demographic "accounting" equation,

Population _t+x = Population _t + Births _x

-Deaths _x + Immigration _x

- Emigration _x

In other words, the size of the population at time t + x is equal to the population at time t plus the births, minus the deaths, plus the immigrants, minus the emigrants, during the interval of time x. This simple formula can be used to derive a variety of rates and statistics describing population change. The equation's main application is to describe short-term change in a population in terms …

Drawn By The Bison Late Prehistoric Native Migration Into The Central Plains, Lauren W. Ritterbush

Great Plains Quarterly

Popular images of the Great Plains frequently portray horse-mounted Indians engaged in dramatic bison hunts. The importance of these hunts is emphasized by the oft-mentioned dependence of the Plains Indians on bison. This animal served as a source of not only food but also materials for shelter, clothing, containers, and many other necessities of life. Pursuit of the vast bison herds (combined with the needs of the Indians' horses for pasturage) affected human patterns of subsistence, mobility, and settlement. The Lakota and Cheyenne, for instance, are described as relying heavily on bison meat for food and living a nomadic lifestyle …