Demand-Side Policies: Monetary and Fiscal Policy
The Role of Central Banks
Monetary policy is executed by a country's central bank, which is distinct from commercial
banks.
Commercial banks are financial institutions that:
Hold deposits for customers (consumers and firms), provide loans, transfer funds, and buy
government bonds.
The central bank is typically a government institution with the following key responsibilities:
Acting as the government's banker by holding cash deposits, receiving and making
payments, and managing government borrowing through bond sales.
Serving as a banker to commercial banks by holding their deposits and providing
loans when needed.
Regulating commercial banks to ensure they operate with appropriate cash levels
and adhere to rules that safeguard the financial system.
Implementing monetary policy by controlling the money supply and interest rates.
Goals of Monetary Policy
Monetary policy seeks to achieve several key objectives:
Low and Stable Inflation: Maintaining a rate of inflation that is low and stable.
Low Unemployment: Keeping unemployment at relatively low levels, specifically
addressing cyclical unemployment.
Reduce Business Cycle Fluctuations: Minimizing fluctuations in real GDP growth to
avoid economic disruptions.
Promote a Stable Economic Environment for Long-Term Growth: Ensuring economic
stability to encourage long-term investments and innovation.
External Balance: Balancing a country's revenues from exports with spending on
imports over time.
Inflation Targeting
Many central banks now use inflation targeting which involves:
Inflation targets are often set between 1.5% and 2.5%, with a tolerance margin of one
percentage point above and below the target.
Advantages of Inflation Targeting:
Achieves a low and stable rate of inflation.
Improves economic decision-making for firms and consumers by allowing them to
anticipate future inflation rates.
Enhances coordination between monetary and fiscal policy.
Disadvantages of Inflation Targeting:
Reduces the central bank's ability to pursue other macroeconomic objectives, like full
employment.
Limits the central bank's ability to respond to supply-side shocks.
An inflation target that is too low may lead to higher unemployment, while one that
is too high can cause problems from high inflation.
, Determination of the Rate of Interest
The rate of interest is determined by supply and demand in the money market.
Money is:
In the money market:
The horizontal axis represents the quantity of money.
The vertical axis represents the rate of interest.
The supply of money is fixed by the central bank and is represented as a vertical line
because it doesn't depend on the interest rate. The demand for money is downward-
sloping: as interest rates fall, the quantity of money demanded increases.
The equilibrium rate of interest is determined by the intersection of the demand and supply
curves for money. Changes in the money supply shift the supply curve, leading to new
equilibrium interest rates.
Equilibrium Rate of Interest
The graph shows how the equilibrium interest rate is determined by the intersection of the
money supply and demand.
Setting a Target Interest Rate
The graph above shows how the interest rate changes according to the money supply.
Central banks set target interest rates and adjust the money supply to achieve these targets.
In practice, central banks don't fix interest rates but allow the market to determine them.
The Role of Central Banks
Monetary policy is executed by a country's central bank, which is distinct from commercial
banks.
Commercial banks are financial institutions that:
Hold deposits for customers (consumers and firms), provide loans, transfer funds, and buy
government bonds.
The central bank is typically a government institution with the following key responsibilities:
Acting as the government's banker by holding cash deposits, receiving and making
payments, and managing government borrowing through bond sales.
Serving as a banker to commercial banks by holding their deposits and providing
loans when needed.
Regulating commercial banks to ensure they operate with appropriate cash levels
and adhere to rules that safeguard the financial system.
Implementing monetary policy by controlling the money supply and interest rates.
Goals of Monetary Policy
Monetary policy seeks to achieve several key objectives:
Low and Stable Inflation: Maintaining a rate of inflation that is low and stable.
Low Unemployment: Keeping unemployment at relatively low levels, specifically
addressing cyclical unemployment.
Reduce Business Cycle Fluctuations: Minimizing fluctuations in real GDP growth to
avoid economic disruptions.
Promote a Stable Economic Environment for Long-Term Growth: Ensuring economic
stability to encourage long-term investments and innovation.
External Balance: Balancing a country's revenues from exports with spending on
imports over time.
Inflation Targeting
Many central banks now use inflation targeting which involves:
Inflation targets are often set between 1.5% and 2.5%, with a tolerance margin of one
percentage point above and below the target.
Advantages of Inflation Targeting:
Achieves a low and stable rate of inflation.
Improves economic decision-making for firms and consumers by allowing them to
anticipate future inflation rates.
Enhances coordination between monetary and fiscal policy.
Disadvantages of Inflation Targeting:
Reduces the central bank's ability to pursue other macroeconomic objectives, like full
employment.
Limits the central bank's ability to respond to supply-side shocks.
An inflation target that is too low may lead to higher unemployment, while one that
is too high can cause problems from high inflation.
, Determination of the Rate of Interest
The rate of interest is determined by supply and demand in the money market.
Money is:
In the money market:
The horizontal axis represents the quantity of money.
The vertical axis represents the rate of interest.
The supply of money is fixed by the central bank and is represented as a vertical line
because it doesn't depend on the interest rate. The demand for money is downward-
sloping: as interest rates fall, the quantity of money demanded increases.
The equilibrium rate of interest is determined by the intersection of the demand and supply
curves for money. Changes in the money supply shift the supply curve, leading to new
equilibrium interest rates.
Equilibrium Rate of Interest
The graph shows how the equilibrium interest rate is determined by the intersection of the
money supply and demand.
Setting a Target Interest Rate
The graph above shows how the interest rate changes according to the money supply.
Central banks set target interest rates and adjust the money supply to achieve these targets.
In practice, central banks don't fix interest rates but allow the market to determine them.
