in addition household surveys tend to be a rich source of additional social and demographic characteristics of workers which can allow the calculation of the indicator for specific subpopulation groups of employees worker coverage of establishment surveys is often limited to paid workers in medium to large establishments and thus often excludes those engaged in microenterprises they may exclude establishments in certain industries eg agriculture as well as workers remunerated predominately by a share of the profits ie salaried directors and managers and those paid on a commission basis without a retainer ie outworkers subcontracted workers