3 For a dynamic model of labor migration in which
urban unemployment rates and expected incomes play
a pivotal role in the migration process, see Todaro. However,
unlike the present model which attempts to view
the migration process in context of aggregate and intersectoral
welfare considerations, Todaro's model was
strictly concerned with the formulation of a positive
theory of urban unemployment in developing nations.
As such, it did not specifically consider the welfare of the
rural sector, nor was it concerned with the broader
issues of economic policy considered in the present
paper