absolute sodal mobility refers to the total amount of movement of people eg an increasedecrease in household income irrespective of a change in the distribution of income while relative sodal mobility refers to the upward or downward movement of a member of one sodal class compared with a member of another dass the section begins with an analysis of income mobility in viet nam from to the concept of income mobility is significant for countries such as viet nam that have experienced stable persistent economic growth and profound structural transformations