Suppose that, initially, the U$.$S$.$ ncononty was in an aggregate demand$-$aggregate sunply equibibum al point A along the aggregate demand curve $AD$ in the diggram. Now, horwewer, the value of the U$.$S$.$ dallar has suddonly appreciated relative to foreign currencies. This appreciation happens to have no measurable effects on either the shart$-$run or the bong$-$run aggragate supply ourve in the United Statns. It does, hawever, inlluence L$.$S aggrngate demand.

a$.$ As a result of the dolar appreciation, U$.$S net emport expenditurns will $$