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The Monetary Policy and Aggregate Demand Curves

Mishkin/Serletis The Economics of Money, Banking, and Financial Markets Fifth Canadian Edition. Chapter 23. The Monetary Policy and Aggregate Demand Curves. Learning Objectives. Understand why there is a positive relationship between real interest rates and inflation, the MP curve

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The Monetary Policy and Aggregate Demand Curves

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  1. Mishkin/Serletis The Economics of Money, Banking, and Financial Markets Fifth Canadian Edition Chapter 23 The Monetary Policy and Aggregate Demand Curves

  2. Learning Objectives • Understand why there is a positive relationship between real interest rates and inflation, the MP curve • Illustrate how the IS curve and the MP curve can be used to derive the aggregate demand curve featured in the aggregate demand and supply framework

  3. The Bank of Canada and Monetary Policy • The Bank of Canada controls the overnight rate by varying the settlement balances (reserves) it provides to the banking system • When it provides more reserves, the excess liquidity causes the overnight rate to fall • When the Bank drains reserves from the banking system, the shortage of liquidity leads to a rise in the overnight rate

  4. The Monetary Policy Curve

  5. The Monetary Policy Curve • The monetary policy (MP) curveshows how monetary policy, measured by the real interest rate, reacts to the inflation rate • The MP curve is upward sloping: real interest rates rise when the inflation rate rises

  6. The Taylor Principle: Why the Monetary Policy Curve Has an Upward Slope • The key reason for an upward sloping MP curve is that central banks seek to keep inflation stable • Taylor principle: To stabilize inflation, central banks must raise nominal interest rates by more than any rise in expected inflation, so that r rises when rises • Schematically, if a central bank allows r to fall when rises, then:

  7. Shifts in the MP Curve • Two types of monetary policy actions that affect interest rates: • Automatic (Taylor principle) changes as reflected by movements along the MP curve • Autonomous changes that shift the MP curve • autonomous tightening of monetary policy that shifts the MP curve upward (in order to reduce inflation) • autonomous easing of monetary policythat shifts the MP curve downward (in order to stimulate the economy)

  8. Shifts in the Monetary Policy Curve

  9. The Inflation Rate and the Overnight Interest Rate

  10. The Aggregate Demand Curve • The aggregate demandcurve represents the relationship between the inflation rate and aggregate demand when the goods market is in equilibrium • The aggregate demand curve is central to aggregate demand and supply analysis, which allows us to explain short-run fluctuations in both aggregate output and inflation

  11. Deriving the Aggregate Demand Curve Graphically • The AD curve is derived from: • The MP curve • The IS curve • The AD curve has a downward slope: As inflation rises, the real interest rate rises, so that spending and equilibrium aggregate output fall

  12. Deriving the AD Curve

  13. Factors that Shift the Aggregate Demand Curve • Shifts in the IS curve • Autonomous consumption expenditure • Autonomous investment spending • Government purchases • Taxes • Autonomous net exports • Any factor that shifts the IS curve shifts the aggregate demand curve in the same direction

  14. Shifts in the AD Curve From Shifts in the IS Curve

  15. Factors that Shift the Aggregate Demand Curve (cont’d) • Shifts in the MP curve • an autonomous tightening of monetary policy, that is a rise in real interest rate at any given inflation rate, shifts the aggregate demand curve to the left • similarly, an autonomous easing of monetary policy shifts the aggregate demand curve to the right

  16. Shifts in the AD Curve from Autonomous Monetary Policy Tightening

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