Chap001Chapter1TheScienceofMacroeconomics(曼昆-宏观经济学-英文版).ppt

Chapter1 The Science of MacroeconomicsnWhat macroeconomists studynHow economists thinknHow this book proceeds1-1 What Macroeconomists StudynEconomic growthnInflation and deflationnUnemploymentnMacroeconomics,the study of the economy as a whole,attempts to answer these and many related questionsSlide 1Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.Slide 2Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.Slide 3Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.1-2 How Economists ThinknTheory as model building(endogenous variables and exogenous variables)nPrices:flexible versus stickynMicroeconomic think and macroeconomic models nTo understand the economy,economists use modelstheories that simplify reality in order to reveal how exogenous variables influence endogenous variables.Endogenous and Exogenous VariablesnEndogenous variables are those variables that a model tries to explain.nExogenous variables are those variables that a model takes as given.nThe purpose of a model is to show how the exogenous variables affect the endogenous variables.Slide 4Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.Slide 5Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.Slide 6Mankiw:Macroeconomics,4/e by Worth Publishers,Inc.