本文利用协整关系检验和向量自回归模型，从短期波动和长期均衡角度，描述和检验了国外总需求和总供给对中国经济增长的拉动作用。

By using the cointegration testing and vector autoregression models, we examine the long-run equilibrium and short-run fluctuations in the growth-led roles of foreign aggregate supply and demand.

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在短期，总供给曲线是水平的。？在长期，总供给曲线是垂直的。

In the short run, the aggregate supply curve is flat. In the long run, the aggregate supply curve is vertical.

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