1. Häkkinen U, Joumard I. Cross-country analysis of efficiency in OECD health care sector: options for research Paris: OECD; 2007. Econmics Deparment working papers No. 554.
2. Smith PC, Häkkinen U. Information strategies for decentralization. Saltman RB, Bankauskaite V, Vrangbaeck K. Decentralization in Health care. Berkshire: Open University Press; 2007 206–24.
3. Eurostat. Handbook on price and volume measures in national account. Luxemburg: European Communities; 2001.
4. Atkison Review. Final Report: Measurement of government output and productivity for the national accounts: Palgrave Macmillan; 2005.