Research on the social economic effect of gradual postponing retirement policy 并列题名：Research on the social economic effect of gradual postponing retirement policy Research on the implemental effect of grain floor price policy Research on the influence and effect of real estate regulation policy Research on the policy of postponing retirement in China Research on the industrial structure effect of China's monetary policy 并列题名：Research on the implemental effect of grain floor price policy Research on the economic effect of rural social security expenditure in China Study on the economic effect of Chinese anti-dumping policy 并列题名：Research on the influence and effect of real estate regulation policy