各位同学，本人需要如下几篇文献，不知哪位能慷慨协助，感激不尽！

Ramsey, S. and M. Pauly (1997), “Structural Incentives and Adoption of Medical Technologies in HMO and Fee-for-Service Health Insurance Plans”, Inquiry 34(3): 228-36.

Goldman, D. P. (1995), “Managed Care as a Public Cost-Containment Mechanism”, Rand Journal of Economics 26(2): 277-95.

Blomqvist, A. (1991), “The Doctor as Double Agent: Information Asymmetry, Health Insurance, and Medical Care”, Journal of Health Economics 10(4): 411-432.

Bothwell, J.L and T.F. Cooley (1982), “Efficiency in the Provision of Health Care: an Analysis of Health Maintenance Organizations”, Southern Economic Journal 47:970-984.