India - Urban Slums Survey: NSS 65th Round, Schedule 0.21, July 2008- June 2009

A stratified sampling design was adopted for selection of the sample first-stage units (FSUs). The FSUs for the survey on condition of slums were Urban Frame Survey (UFS) blocks in urban areas. Information was collected on each slum, notified or non-notified, found in the entire area of the selected first stage units. In some cases, the area of a slum was very large and extended beyond the selected FSU. In such cases, information was collected only for the part of the slum falling within the sample FSU. For a notified slum, too, only the part of the slum falling within the sample FSU was considered as one slum and surveyed as such. It may be noted that if a slum cut across more than one FSU, all the slum particulars recorded would relate to the part of the slum which fell in the selected FSU. A
detailed discussion on the sample design and estimation procedure followed in the survey is given as an attachment to external resources.

There was no deviation from the original sample deviation.

A total of 4764 FSUs (i.e., UFS blocks) were selected for the Central sample in this survey, of which 4738 could be surveyed (a response rate of 99.5 percent). At the all-India level, a total of 730 slums were covered in these surveyed urban blocks.
Sample weights were calculated and included in each of the data files.
Variable 'Wgt_SS' refers to Multiplier for each Subsample.
Variable 'Wgt_Combined' refers to Combined Multiplier.