When discussing the classical model, I believe there was some discussion of the effects of a balanced-budget increase in government expenditures (G=T). Now let's consider these in a Keynesian model

Suppose that the government increases its expenditures,G>0, but raises taxes by the same amount in order to keep the budget balanced such thatG=T Does this have SR and LR effects in r,y, and p given the IS/LM and AS/AD models?