Aggregate Supply Curve
Aggregate supply curve 描述在每個 Price level 下，企業願意生產與銷售的 goods and services 總量。
AS 和 AD 最大的差別是它的形狀取決於時間長短：
Long-run Aggregate Supply
D-MacroEcon-Ch34da-Long_Run_Aggregate_Supply
Short-run Aggregate Supply
D-MacroEcon-Ch34db-Short_Run_Aggregate_Supply