In the complete aggregate expenditures model, equilibrium GDP occurs where C a 1 I g 1 X n 1 G 5 GDP. At the equilibrium GDP, leakages of after-tax saving ( S a ), imports ( M ), and taxes ( T ) equal injections of investment ( I g ), exports ( X ), and government purchases ( G ): S a 1 M 1 T 5 I g 1 X n 1 G .

Also, there are no unplanned changes in inventories.