In the Phillips Curve $\Delta \pi _ { t } = \overline { \boldsymbol { v } } \tilde { Y } _ { t } + \bar { a } , \bar { a }$

True/False

In the Phillips curve, $\Delta \pi _ { t } = \overline { \boldsymbol { v } } \tilde { Y } _ { t } + \bar { a } , \bar { a }$
represents a change in government spending.