The changes in distribution of sectors with economic development

   ü   The proportions of labour force employed in the different sectors of the economy vary according to the level of economic development.

   ü   In the earlier stages of economic development, the workers from primary sector move to the secondary sector.

   ü    As a result, real incomes continue to rise and there is an increasing demand for services. This leads to movement of workers to tertiary sector from primary and secondary sectors.