1. Regression model and life table;Cox;Journal of the Royal Statistical Society B,1972
2. Provider behavior under prospective reimbursement;Ellis;Journal of Health Economics,1986
3. The incidence of mandated maternity benefits;Gruber;American Economics Review,1994
4. Hehenkamp B Kaarb O 2006 http://www.hero.uio.no/pdf/WsBergen.pdf
5. Special report: results and policy implications of the resource-based value study;Hsiao;New England Journal of Medicine,1988