1 The model of aggregate demand and supply ■the paradigm(范例)that most mainstream economists& policymakers use to think about economic fluctuations and policies to stabilize the economy shows how the price level and aggregate output are determined shows how the economy's behavior is different in the short run and long run Return CHAPTER 9 Introduction to Economic Fluctuations slide 7 slide 7 § the paradigm (范例) that most mainstream economists & policymakers use to think about economic fluctuations and policies to stabilize the economy § shows how the price level and aggregate output are determined § shows how the economy’s behavior is different in the short run and long run 1 Return