The results show that health investment on the Chinese urban households is positively related to the family disposable income and age through establishing multiple linear regression models,influence force of age is more than influence force of income;household is inclined to self-insurance,and bank deposit is primary self-insurance tool.

The paper presents two financing type risk management techniques risk retention and risk insurance transfer, introduces their proper applied conditions and ranges,comparatively analyzes them from net prevent value, opportunity loss, worry value and so on, demonstrates how to use Total Expected Cost principle to select optimal mix of retention and insurance with the example.

The Natural Risk of the Production and Business by the Farmer and Its Control;

Application of extremal distribution to natural risk prediction of construction project

The major self risk of our country s small and big sized enterprises mainly shows in three respects:market competitive risk,credit risk and policy risk.