The multiplier effect occurs when an initial increase (or decrease) in autonomous expenditure produces a greater increase (or decrease) in real GDP than the initial change. In which type of discretionary fiscal policy does the multiplier play a role? tax changes only neither government spending changes nor tax changes government spending changes only both government spending changes and tax changes Assume a marginal propensity to consume (MPC) of 0.5. Which discretionary fiscal policy would have a more pronounced impact on the economy? A 800 billion dollar increase in government spending, or a 800 billion dollar tax cut, would both have an equal impact on the economy. A 800 billion dollar increase in government spending would have a more pronounced impact on the economy. A 800 billion dollar tax cut would have a more pronounced impact on the economy.