Unit 3: Macroeconomic Policy

Lesson 16a: Monetary Policy

Introduction

 

Get this right: THE FED DOES NOT SET INTEREST RATES. I know you will read in the news that the "Fed has increased interest rates". But the Fed does NOT change interest rates. Banks set their own interest rates, BUT the Fed can cause banks to raise or lower their rates.

Also, the Fed does not change the money supply (MS). As we learned in the previous lesson (15a) banks create money and therefore banks change the money supply, NOT THE FED. But you may ask, didn't we say in lesson 12c that the Fed changes the MS? Yes we did, but we didn't say how they do it. We will do that here.

We will learn that the Fed has three tools to control the MS: open market operations (OMO), the discount rate (DR), and the required reserve ratio (RR). The Fed uses these three tools to change the excess reserves (ER) of banks. And, as we learned in the previous lesson (15a) if banks have more ER they can make more loans and increase the money supply (MS) and if banks have fewer ER they make less loans and decrease the MS.

Finally, as we learned in lesson 12c, when the MS changes this causes interest rates to change. When interest rates change then this causes Investment (I) to change (and also consumption [C]). When Investment (I) changes it causes aggregate demand (AD) to change. When AD changes it causes a change in the price level (PL) and real domestic output (RDO). When the PL changes it causes a change in inflation (IN) and when RDO changes it causes a change in unemployment (UE) and economic growth (EG).

To understand how monetary policy (MP) works you need to get the CAUSE and EFFECT order correct. What CAUSES what? The "" symbol below means CAUSES. Notice that is an arrow pointing only in one direction meaning that what comes before CAUSES what comes after. For example: not studying lower grades.

Memorize the following. Practice writing it until you get it correct.

 

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Lesson 16a