2008年金融危机后，大规模财政支出成为各国刺激经济的主要措施之一。然而，在这些支出中，各国政府消费的产品差异明显。有鉴于此，本文构建了一个包含制造业和服务业两部门的新凯恩斯模型，并通过计算总量支出乘数和结构支出乘数来研究政府消费不同产品对总产出和两部门产出的影响。研究发现，需求引致、要素流动、政府总支出的挤出和财富效应是政府消费发生作用的四种机制；政府增加制造业消费，会通过财富效应等机制挤出政府总支出，使总产出增加和制造业产出增加，但会使服务业产出下降；政府增加服务业消费时，会使服务业产出上升，但将显著挤出政府总支出，使总产出和制造业产出下降。%After the financial crisis in 2008, many countries have launched large-scale government spending plans, yet there is great difference in the goods consumed by different governments. In view of this, this paper constructs a New Keynes model which includes both the manyfacturing sector and the service sector, and uses the aggregate and structural multiplier to analyze the effects of governments consumption of different goods on the total output and the two sectors. The results are as fol-lows:Government consumption emits its effects through the four mechanism, i. e. demand-induced, factor flow, expenditure extrusion and wealth effect; When governments consume manufactured goods, the aggregate government spending declines, output increases, the output of manufacturing sector increases and the output of service sector declines; When governments consume service goods, the output of service sector rincreases, but the aggregate government spending is squeezed out obvious-ly, and the aggregate output and manufacture output decrease;As the structure of government consumption, that is, the ratio of manufacture goods consumption increases, the aggregate multipliers both rise.
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