OECD Tax Policy Studies no 13 OECD Tax Policy Studies no 20 OECD Tax Policy Studies no 16 Tax policy and tax reform in the People's Republic of China Taxation and investment in Colombia_OECD Economics Department Working Paper_No. 1204 Tax design for inclusive economic growth_OECD Taxation Working Papers No. 26 Moving beyond the flat tax_Tax policy reform in the Slovak Republic_OECD Taxation Working Papers No 22 Making fundamental tax reform happen_Brys Effective personal tax rates on marginal skills investments in OECD countries_Brys_Torres