And most of them are qualitative or case tracing study, which lack quantitative study on the effects of Financial Policy of Derate and Subsidy itself on the economic impact.

• 但这些研究多数都是定性的研究或者是对个别案例进行的追踪，没有人就两免三补这一政策本身是否会对农业产出、农民收入等经济效果产生影响进行定量的研究。