Radiation law for human mobility

The radiation law is way of modeling human mobility (geographic mobility, human migration) and it gives better empirical predictions than the gravity model of migration which is widely used in this subject. == Intercity mobility == Waves of migration due to displacement by war, or exploitation in the hope of geographical discoveries could be observed in the past, however with new technological advancements in transportation keep making it easier and cheaper to get to one place from another.

Source: Wikipedia — Radiation law for human mobility (CC BY-SA 4.0)