8Chee-Ruey Hsieh, Shin-Jong Lin. Health Information and the Demand for Preventive Care among the Elderly in Taiwan[J]. The Journal of Human Resources, 1997, Vol. 32, No. 2:308 -333.
9Cropper, M. L. Health, Investment in Health, and Occupational Choice[J]. J. P. E. ,1977, 85 : 1273 - 1294.
10Dardanoni, V. , and A. Wagstaff. Uncertainty and the demand for medical care [J]. Journal of Health Economics, 1990, 9:23-38.
