Keynesian Worksheet. Introduction to the Keynesian Multiplier, Marginal Propensity to Consume, and Macro Equilibrium. Name: Course: GDP TAX DI C S H G EX IM NX AE Iu NI 20% Ca=10 25 17.5 5 At MPC=0.8 10% 0 25 50 75 100 125 150