If 100 working-class people move upward on the class ladder and, at the same time, 100 middle class people experience downward mobility, sociologists would consider this to be an example of __________ mobility.
Exchange social mobility refers to a sociological phenomenon wherein the number of people moving up and down the social class ladder at a given point in time remain relatively the same. An assumption of this theory is that all social classes comprise of approximately the same number of people.