Before revision: It can refer to various things which decline with greater distance from the center of the Central Business District (CBD): density of pedestrian traffic street quality quality of shops (depending on definitions of 'quality' and 'center') height of buildings price of land Distance decay weighs into the decision to migrate, leading many migrants to move less far.
After revision: It can refer to various things which decline with greater distance from the center of the central business district (CBD): density of pedestrian traffic street quality quality of shops (depending on definitions of 'quality' and 'center') height of buildings price of land Distance decay weighs into the decision to migrate, leading many migrants to move less far.