Chapter 21 is titled “the influence of monetary and fiscal policy on aggregate demand.” It begins by explaining how monetary policy influences aggregate demand by focusing on the theory of liquidity preference, the downward slope of the aggregate-demand curve, changes in the money supply, the role of interest-rate targets in Fed policy. It continues to describe how fiscal policy, “the setting of the level of government spending and taxation by government policymakers”, influences aggregate demand, with focuses on changes in government purchases, the multiplier effect, and the crowding-out effect. Finally, it discusses how policy can be used to stabilize the economy, and explores the benefits and negatives of this choice, as well as what automatic stabilizers are.
Consumer confidence interacts with public policies when in a recession because when households are pessimistic they reduce consumption spending which leads to reduced aggregate demand, lower production, and higher unemployment. However, in boom, when households are confident this leads to the opposite effect. Keynes argued that this is to the benefit of the government because they can change policies to correspond with these beliefs. However, this is also something that the Fed and policy makers cannot control and it can have huge influences on the economy that they did not anticipate and did not cause, which can cause a lag between the change and when a policy is actually enforced. This can make policies more effective in achieving economic stability if the beliefs correspond with the policy or if the policy makers can implement it quickly enough, however, it will be less effective if there is a lag because the economy could change by the time it makes a difference and the economy should be left to stabilize itself.