中国社会福利函数的构建及财政效果研究

A Study on the Construction of Chinese Social Welfare Function and Its Fiscal Effect

目前中国提出要逐步实现从补缺型社会福利体系向适度普惠型社会福利体系转变,文章以个体绝对收入和贫富差距为基本出发点,从市场配置和政府配置两个角度构建社会福利函数。对福利函数进行模拟发现:农村和城镇居民社会福利总量模拟图都呈现U型曲线。社会福利权重因子越大或财政政策越紧缩,U型曲线越明显。在同等条件下,扩张性财政政策和社会福利权重因子增大都会致使农村社会福利总量产生滞后效应,亦即表明城镇社会福利总量对扩张性财政政策和贫富差距拉大更敏感。

At present,China＇s social welfare system is gradually shifting from insufficient to appropriate universal. Taking individual absolute income and polarization as the basic point,this paper constructs social welfare function from the perspectives of market-allocated and government-allocated. The results from simulation of welfare function contain：The total amountof rural and urban social welfare simulation diagrams present U-shaped curves,the greater the social welfare weight factor orthe tighter fiscal policy,the more obvious the U-shaped curve;Under the same condition,expansionary fiscal policy and increasing social welfare weight factor will make a lag effect of total rural social welfare which shows that the total town socialwelfare is more sensitive to expansionary fiscal policy and income polarization.