财政政策作为政府宏观经济政策的重要组成部分，它对宏观经济的运行具有重要的调节作用，是政府进行宏观经济管理的重要手段。成本与收益是制约财政政策效益大小两个重要方面。成本一般由创新成本、实施成本、外部成本和机会成本等四部分组成。再看财政政策的收益。在其它条件 As an important part of the government’s macroeconomic policy, fiscal policy plays an important regulatory role in the operation of the macroeconomy and is an important means for the government to carry out macroeconomic management. Costs and benefits are two important aspects that constrain the effectiveness of fiscal policy. Cost usually consists of four parts: innovation cost, implementation cost, external cost and opportunity cost. Look at the benefits of fiscal policy. In other conditions