AP subjects/AP Human Geography/Gravity Model & Distance Decay
CED 1.4AP Human Geography

Gravity Model & Distance Decay

also applied in 2.10 (migration)

Controls
P1P2distance

More AP Human Geography simulators

CED 2.3
Population Pyramid Builder
CED 2.5
Demographic Transition Model
CED 6.5
Urban Land-Use Models
CED 5.8
Von Thünen Model — Land-Use Rings & Bid Rent