1.1 Objectives and Scopes of Macroeconomics Content Four: Inflation ⊙ Basic concepts e Prices of most commodities and services keep increasing during certain time in one economy o Reasons Issued too many currencies, overmuch demands for investment and consumption, increase of cost such as Wages 友学经济学院1.1 Objectives and Scopes of Macroeconomics Content Four：Inflation  Basic concepts ❖ Prices of most commodities and services keep increasing during certain time in one economy.  Reasons ❖ Issued too many currencies、overmuch demands for investment and consumption、increase of cost such as wages