城乡居民社会养老保险缴费水平及其影响因素——基于陕西省三市的调查
성향거민사회양로보험격비수평급기영향인소——기우합서성삼시적조사
Social Endowment insurance Payment Level of Urban and Rural Residents and its Influencing Factors --based on the survey in three cities of Shaanxi Province