Gravity Models
E.G. Ravensteins's (1885) ?Laws of Migration? 1. Most migrants move only a short distance, and then typically to major cities. 2. Rapidly growing cities are populated by migrants from nearby rural areas; in turn, the ?gaps? left in the rural population are filled by migrants from more distant areas. 3. The process of dispersion is the inverse of the process of absorption and exhibits similar features. 4. Each main current of migration produces a compensating counter current. Continued? 5. Long-distance migrants tend to move to major cities. 6. Rural people have a higher propensity to migrate than urban people. 7. Women have a higher propensity to migrate than men.