The NSSO uses three different tests to measure the % of employment :
- Usual Status(US) concept, which has a reference period of one year and classifies a person as employed or unemployed on the basis of his activity for the major part of the year.
- Current Weekly Status(CWS) includes a person if he has not worked even for one hour during the week, though available for work.
- Current Daily Status (CDS) measures all the days of employment/unemployment as well as underemployment during the week.
Chronic unemployment can be measured by US and CWS data. However, for policy formation, all the three sets of data are used in conjunction. It is belived that the CDS data gives more realistic estimate.