There exists prevailing information asymmetry in the health care market,physician-induced demand become an intractable problem in controlling rapid increasing medical cost.

• 医疗费用逐年增长,由于医疗服务供方在医疗信息上的优势及医疗产业化的背景,使得医疗供方诱导需求现象成为医疗费用增长不可忽视的因素,大部分的研究都无法对诱导需求现象进行定量研究。