This section briefly introduces the methodology employed for this Report, which focuses on employees. It is assumed that their annual income from employment is equal to a given fraction of the average gross wage earnings of adult, full-time workers covering industry Sectors C-K inclusive with reference to the International Standard Industrial Classification of All Economic Activities, Revision 3 (ISIC Rev. 3)* of each OECD economy, also referred to as the average wage. Further details are provided in Part IV of this Report. Additional assumptions are made regarding other relevant personal circumstances of these wage earners in order to determine their tax/benefit position. The taxes included in the present Report are confined to personal income tax, social security contributions and payroll taxes (which, in this Report, are aggregated with employer social contributions in the calculation of tax rates), payable on gross wage earnings. Consequently, any income tax that might be due on non-wage income, as well as all other kinds of taxes – e.g. corporate income tax, net wealth tax and consumption taxes – are not taken into account in this Report. The benefits included are those paid by general government as cash transfers, usually in respect of dependent children.