1. Complementarity Supply and Demand

2. Transferability You’ve got what I want, but …..

3. Friction of Distance, Distance Decay, Intervening Opportunity

4. Distance Decay V = c = I d 2 Interaction between two places (volume of flow) is inversely related to the square of the distance separating them. City B is between cities A and C. City B is 10 miles from A, and 20 miles from C. If there are 4,000 emails sent between B and A, how many emails would be sent between B and C?

5. Gravity Model I = (P 1 x P 2 ) d 2

6. Breaking Point Two cities are 60 miles apart. City A has 400,000 people, and City B has 100,000 people. Calculate the breaking point for the two cities. BP = d 1 + √(p 2 /p 1 ) 60 mi

7. Perception TV/Radio Magazines, newspapers, books, lectures Travel brochures Hearsay.

8. Perception of Environment

10. Migration Permanent Residential and Activity

11. 16 th – 20 th

13. Migration Types Forced Reluctant Relocation –refugee Voluntary –Motivators?

14. Controls on Migration Economics –Developed = low end jobs? Place Utility -> Spatial Search Step/Chain Migration –The devil you know… uncertainty ?

15. Laws of Migration Most are Short Long favors Big Cities Most Step by Step Most Rural->Urban Each = Counter Most are adults Most are young male