Social mobility is the movement in time of individuals, families or other social units between positions of varying advantage in the system of social stratification of a society. Classical authors have studied social mobility primarily in its contribution to class or status group formation. Recent research concentrates on identifying the degree to which individuals' social opportunities in life are conditioned by their social origins (conditions of life in the parental family) and on specifying the individual, institutional and societal factors responsible for it. Studies of the process of status attainment show that the social status or prestige level of a job attained by a person at a given point in his or her career strongly depends on e...