However, Klasen (2004) argues that, “[a]s no society, past or present, treated the two sexes equally and the two sexes did not differ in survival-related behaviours, it is hard to separate biology from behaviour. Thus it is hard to say whether females ‘should’ enjoy a longevity advantage of 3,4, or five years”. Views vary on whether income and labour force participation are relevant indicators related to women’s well-being. Klasen (2004) argues that it is not immediately clear that gender inequalities in labour force participation should necessarily be seen as relevant for a well-being assessment, as it might be the result of a consensual division of labour within the household.