进一步地，根据城乡二元体制的差异以及家庭收入水平的异质性进行子样本估计

Further, according to family income levels and differences in urban-rural dual system of heterogeneous sub-sample estimates showed that elderly parents home health impact of crowding in the household expenditure on education and middle-income rural households is more significant and there is a significant mediating effect on medical expenses for an intermediary variable.

Further, according to the difference between urban and rural dual system and the heterogeneity of household income level sub-sample estimation, the results show that the extrusion effect of the health impact of elderly parents on household education expenditure is more significant in rural households and middle-income households, and there are significant intermediary effects with medical expenditure as intermediary variables.

Further, according to the difference between urban and rural dual system and the heterogeneity of family income level, the result shows that the crowding out effect of the elderly parents' health shock on family education expenditure is more significant in rural families and middle-income families, and both exist in the significant intermediary effect with medical expenditure as the intermediary variable.<br>