In addition, household composition may be endogenous to the receipt of a social grant as argued by Ardington et al (2009). The authors use panel data for the KwaZulu-Natal region and find that the negative impact on labour supply disappears when the impact on non-resident household members is taken into account. The analysis is novel because of the data used, the long period examined and in particular the population group that is analysed.48 The impact of the OAP on labour market outcomes of young and prime-age adults is identified by comparing black adults (20-45 years old) in households with eldest members just above the age-eligibility threshold for receiving the OAP with those in households with eldest members just below the age threshold and hence not likely to be receiving the OAP.