6.1 AD Function: S-LM Curves and AD Curves in Short or Long Term ⊙|S-LM: Y=C(Y-7)+I(7)+ M/P=L(r) o Short term(Keynesian): given P= P1, solve r andy IS-LM for a given price level o Long term(Classical): given Y=YLR solve r and p LRAS and ad curves 友学经济学院6.1 AD Function：IS-LM Curves and AD Curves in Short or Long Term  IS-LM：  Short term (Keynesian)： given P = P1,solve r and Y。 ❖ IS-LM for a given price level  Long term (Classical)： given Y = YLR solve r and P。 ❖ LRAS and AD curves / ( , ) ( ) ( ) M P L Y r Y C Y T I r G = = − + +