試題詳解

18. A typical IS-LM model composes AD, and AS is the aggregate supply curve of the classical school. Analyzing the U.S. economy in the face of Covid-19 in 2020 with the model, which of the following is a correct statement?
(A) The lockdown shifts the AD leftward
(B) The lockdown moves along the AD upward
(C) The increased unemployment moves the AS leftward
(D) The hospitalization of workers does not shift the AS.