- Migration

 Where are migrants distributed?
 Where do people migrate within a country?
 Why do people migrate?
 Why do migrants face obstacles?

- Mobility is generalized term that refers to all type of movement

- Short-term repetitive acts of mobility are refered to as circulation

- Permanent move to a new locations constitutes migration

      Ravenstein's law for the distance that migrants typically move

- most relocate with the same country

- long distance migrants to other countries head for major centers of economic activity