MACROECONOMICS

INTRODUCTION

  • The decade of 1970’s and the early 1980’s faced numerous macroeconomic problems, prominently including the oil shock as the OPEC oil cartel raised prices, which consequently intensified inflation globally.

  • Various countries, including the USA, went through a recession marked by high unemployment.

THEORIES ADVANCED TO ADDRESS MACROECONOMIC ISSUES

  • Several economic theories have emerged to provide potential solutions to basic economic questions, including:

    • Post Keynesian

    • Monetarists

    • Demand-side views

    • Supply-side views

  • Some of these theories carry contradictory positions, while others complement each other. The primary focus of this course is to delve into the diverse economic ideas formulated to address and influence global economic challenges.

REVISION OF SOME BASIC CONCEPTS

Microeconomics vs Macroeconomics

  • Microeconomics:

    • Investigates how individuals allocate scarce income or resources among competing wants or production goals.

    • Studies factors that affect relative prices of different goods and production factors in individual markets, e.g., supply and demand for milk or motor vehicles.

  • Macroeconomics:

    • Concerns aggregate variables such as:

    • Aggregate demand by all consumers for all goods and services produced over a set period.

    • Key aggregate economic phenomena:

      1. Inflation

      2. Interest rates

      3. Growth rate of income/output

      4. Unemployment rates

      5. Government spending

      6. Private domestic investment

      7. Aggregate disposable income

      8. General price levels

    • Explains how aggregate variables (national output, employment, prices) interact to determine the state of the national economy.

BUSINESS CYCLES / EQUILIBRIUM

  • Two schools of thought exist regarding equilibrium restoration:

    1. Automatic measures

    2. Discretionary measures

  • The government can choose either of the two policies: fiscal or monetary.

Fiscal Policy and Goals

  • Defined as attempts to manipulate government expenditure and taxation to influence aggregate demand or supply to achieve macroeconomic goals, such as:

    • Full employment

    • Price stability

Monetary Policy

  • Aims to influence money supply growth, which can impact inflation and employment levels. The primary objectives are:

    • Achieving full employment

    • Attaining price stability

Aggregate Demand and Supply Framework

Case 1: Full Employment Level

  • When the economy operates at full employment:

    • The aggregate supply of goods and services does not respond to increases in aggregate demand.

    • The aggregate supply curve is vertical (perfectly inelastic).

    • An increase in aggregate demand through fiscal or monetary policy leads to inflation.

Case 2: Economy Not at Full Employment

  • If the economy is responsive to increases in aggregate demand (not at full employment), the following occurs:

    • Increased aggregate demand leads to a rise in both output and inflation.

    • A trade-off exists between changes in output/employment and changes in price levels.

    • Expansionary policy that raises AD increases output and prices.

Use of Fiscal and Monetary Tools to Address Macroeconomic Problems
Use of Fiscal Policy Tools

  • Depression Period:

    • Government may attempt to stimulate aggregate demand by implementing tax cuts and increasing government spending programs to boost national employment and output.

  • Inflation Period:

    • The fiscal approach during inflation typically involves:

    • Increasing taxes or tax rates

    • Reducing government spending to curtail aggregate demand.

Use of Monetary Policy Tools

  • Involves manipulating bank reserves through:

    • Changes in the discount rate

    • Open market operations (buying/selling securities)

    • Alterations in reserve requirements.

Definitions

  1. Bank Reserves: Cash reserves backing deposits (checking, savings, etc.) held by commercial banks.

  2. Discount Rate: Interest rate charged by the central bank to financial institutions for lending.

  3. Open Market Operations: Buying/selling of securities by the central bank affects bond prices and interest rates.

  4. Legal Reserve Requirement: Percentage of deposits that financial institutions must hold as reserves.

Reasons for Controlling Monetary Reserves

  • By adjusting monetary reserves, the central bank can influence the money supply and interest rates, thereby altering private consumption, investment, employment, output, and prices.

Case Scenarios
Case 1: Depression Period

  • To elevate aggregate demand, the central bank should:

    • Increase the money supply

    • Lower interest rates through:

    1. Reducing discount rates

    2. Buying securities in open-market operations

    3. Lowering legal reserve requirements.

Case 2: Inflationary Period

  • Apply opposite measures, tightening money supply to stabilize prices.

Discretionary Vs Automatic Stabilization

  1. Fiscal and monetary policy may be termed discretionary, requiring direct intervention.

  2. Some economists question the effectiveness of discretionary policies, believing that economies naturally adjust back to full employment through market mechanisms.

Contrasting Macroeconomic Views

  1. Classical (Neoclassical) View:

    • Asserts that competitive markets allow automatic adjustments in prices, wages, or interest rates to restore full employment. Minimal government intervention is advocated.

  2. Keynesian View:

    • John Maynard Keynes argued against classical views, suggesting that economies could remain in recession despite equilibrium, thus requiring government intervention through discretionary fiscal policies during economic downturns. Expansionary fiscal policies are essential during high unemployment.

  3. Monetarist View:

    • Led by Milton Friedman, it combines elements of classical perspectives with a focus on a steady money supply. Discretionary policies are criticized as they induce uncertainty and can exacerbate economic fluctuations.

Demand-Side Vs Supply-Side Analysis

Aggregate Demand Analysis

  • Concerns the causes of demand for goods and services, supported by both post-Keynesians and monetarists, emphasizing the role of demand management.

Aggregate Supply Analysis

  • Focuses on labor productivity and capital investment. Supply-side arguments highlight the necessity of stimulating productivity to overcome issues of inflation and unemployment, proposing policies like:

    • Tax cuts

    • Deregulation

    • Reducing operational costs for businesses.

Supply-Side Economics

  • Rooted in classical economics, emphasizing that increased production generates demand (Say’s Law).

CLASSICAL ECONOMICS THEORY

Four Pillars of Classical Economics

  1. Say's Law: Supply creates its own demand.

    • Jean-Baptiste Say theorized that production must precede demand, implying effective economic activity leads to consumption.

  2. Classical Theory of Demand for Money:

    • Stresses money's role as a medium of exchange, where total value of transactions (T) equals total money supply (M) times the velocity of circulation (V).

    • Fisher's equation: MV=PTMV = PT, assuming V is constant.

  3. Real Theory of Interest:

    • Interaction between household savings and business investments sets interest rates, characterized as the "natural rate of interest".

    • Savings increase with higher interest rates, and businesses will invest until the marginal productivity of capital equals market price.

    • Economic behavior can be depicted by equations relating aggregate investment and savings to interest rates.

  4. Wage and Price Flexibility:

    • Labor market flexibilities support achieving full employment through price fluctuations.

    • A.C. Pigou supported this view, arguing that wage adjustments could alleviate unemployment efficiently.

Classical Model Graphical Representation

Aggregate Supply & Demand Equations

  • Basic equations to depict classical economics include the aggregate demand and supply functions, along with equilibrium conditions in the capital market.

The J-Curve Phenomenon

  • A short-run worsening of the balance of trade post-depreciation followed by eventual recovery in long-term equilibrium due to increased exports and reduced imports.

Equilibrium in Balance of Payments (BP Curve)

  • BP depicts conditions under which balance between imports and exports exists. The curve slopes upward, representing net capital inflow dependency on the interest rate and income level.

  • Shifts in BP result from changes in exchange rates, imports/exports due to income variations, and capital flow dynamics.

FISCAL AND MONETARY POLICY

  • Comparison of fiscal and monetary policy impacts on income and interest rate reveals their effectiveness depending on the elasticity of IS and LM curves, influencing economic conditions under various scenarios.

SUMMARY

  • Fundamental economic concepts explored focus on theoretical implications of classic and modern economics, especially surrounding fiscal and monetary frameworks, balance of payments analysis, and sophisticated market interactions in open economies. The integration of these perspectives highlights the complexity of macroeconomic stability.