I.  Definitions and Significance

1. Definition: permanent relocation of residential place and activity space
2. Importance of studying migration patterns:
   
   1. Increasing global mobility in today's world, easier to migrate
   2. Integrative issue in geography, i.e. urbanization
   3. Policy relevance: labor markets--can labor and information flow freely between countries?  How can nations help refugee camps
3. Migration Typology:
   
   1. Forced migration: individuals forced to leave their country, i.e. Africans brought to U.S. as slave labor
   2. Reluctant or fleeing migration: individuals are not forced out of their country, but leave because of warfare, political problems, or ethnic purging 
   3. Voluntary or volitional migration: individuals choose to relocate to new places because of opportunities offered in the new place
4. Factors influencing the migration decision:
   
   1. Economic: utility maximization
   2. Push and pull factors: good weather, good services, family, etc.
   3. Spatial search, uncertainty, and hierarchical decision-making

II.  Migration models, equations and laws:

1.     Demographic Accounting Equation:
             P(t + 1) = P(t) + I(t, t + 1) - E(t, t + 1)     net international migration
                             I = Immigration
                             E = Emigration
2. Migration Biographies 
3. Age Profile of Migration and the life course 
4. Gravity Models
   
   1. Newton's law of universal gravitation
   2. Spatial Interaction
5. Chain Migration 
            --people begin to migrate along certain channels
6. Ravenstein's Migration Laws (1870's-1880's):
   
   1. Most migrants go only a short distance (gravity law)
   2. Longer-distance migration favors big-city destinations
   3. Most migration proceeds step by step
   4. Most migration is rural to urban
   5. Each migration flow produces a counter flow (i.e. return to place of birth)
   6. Most migrants are adults--families are less likey to make international moves
   7. Most international migrants are young males