Types of occupational mobility of labour

Horizontal mobility of labour refers to the change of occupation   where no change occurs in the status of the worker.  For  example   a biology  teacher  becoming   a chemistry   teacher,  a minister   of finance  becoming  a minister  for internal  affairs.

Vertical mobility of labour refers to the change of occupation   which results into a change in the status of the worker.  For example when a classroom teacher becomes   a headmaster,   a nurse becoming a doctor.