The current level of urbanisation in Pakistan, approximately 33 percent in 1998, is not high by global standards.1 But it is commonly linked with unemployment, underemployment, shortage of housing, transport and other infrastructure like water supply and sewerage. Compared to other areas of population dynamics, such as fertility and mortality, studies in the field of urbanisation and internal migration in Pakistan are rather limited. During the last three decades hardly half a dozen studies could be added in the field of urbanisation. These studies are primarily based on data generated by the different censuses.2 After the 1979 Population Labour Force and Migration (PLM) Survey, no nationally representative survey addressing the issue of urbanisation and internal migration could be carried out. Even regional studies could not be conducted during the last two decades.