This document discusses different theories of migration. It first talks about factors that influence a person's likelihood of migrating, such as gender, age, financial status, skills, family ties, and availability of transportation. It then discusses Ernest Ravenstein, who in the 1880s developed "laws of migration" stating that economic opportunities are the main driver of migration and that migration occurs in stages over distance. Later parts of the document discuss gravity models of migration, Zelinsky's model of changing migration patterns throughout history, and Everett Lee's behavioral model which gave more emphasis to internal push factors and intervening obstacles.

1. The ability of an individual to move/ migrate from one area to another. MOBILITY MIGRABILITY How likely is a person to migrate.