Gravity Model of Migration: W.J. Reilly and G.K. Zipf

In the 1950s, Geographers and Demographers were increasingly attracted to methods of positivist sciences such as physics and mathematics. Therefore, they used different theories and models of these sciences in their own field to gain validation from the scientific community. This paradigm in social sciences is known as quantitative revolution. The Gravity Model of Migration … Read more

Theory of Intervening Opportunities by S.A. Stouffer

Samuel A. Stouffer gave the theory of intervening opportunities in his work “Intervening Opportunities: A Theory Relating Mobility and Distance” in 1940. This theory shows that the nature of geographic space is more important than the distance in determining migration behavior. According to Ravenstein’s Laws, distance is the most important factor in determining the migration … Read more