Chapter 11: Long-Run Economic Growth

Economic Growth Over Time Around the World

Economic growth refers to the sustained increase in a country's output of goods and services, typically measured by real GDP per capita. Comparing growth rates across countries reveals significant differences in living standards and development.

• Key Point: Growth rates vary widely, with some countries experiencing rapid increases in income and others stagnating.

• Example: East Asian economies (e.g., South Korea, Singapore) have grown much faster than many African economies over the past 50 years.

What Determines How Fast Economies Grow?

The rate of economic growth depends on several fundamental factors, including capital accumulation, technological progress, and institutional quality.

• Key Point: Physical capital, human capital, and technology are primary drivers of growth.

• Key Point: Institutions (such as property rights and political stability) play a crucial role in fostering growth.

• Formula: The Solow growth model expresses output as: where is output, is technology, is capital, is labor, and is the capital share.

Economic Growth in the USA

The United States has experienced sustained economic growth, driven by innovation, investment, and a strong institutional framework.

• Key Point: The U.S. has one of the highest real GDP per capita levels globally.

• Key Point: Growth has been supported by technological leadership and a dynamic financial system.

• Example: The U.S. economy grew rapidly during the post-WWII era, with productivity increases and expansion of higher education.

Why Isn't the Whole World Rich?

Global disparities in income and living standards are due to differences in growth rates, which are influenced by access to capital, education, technology, and effective institutions.

• Key Point: Barriers such as poor governance, lack of infrastructure, and limited access to education hinder growth in many countries.

• Key Point: Poverty traps and institutional failures can prevent countries from achieving sustained growth.

Growth Policies

Governments can implement policies to promote economic growth, including investment in education, infrastructure, and research and development.

• Key Point: Policies that protect property rights and encourage entrepreneurship foster growth.

• Key Point: Trade openness and macroeconomic stability are also important for long-run growth.

• Example: Government subsidies for R&D and tax incentives for investment.

Chapter 13: Aggregate Demand and Aggregate Supply Analysis

Aggregate Demand Curve

The aggregate demand (AD) curve shows the relationship between the total quantity of goods and services demanded and the price level in the economy.

• Key Point: The AD curve slopes downward due to the wealth effect, interest rate effect, and international trade effect.

• Formula: AD can be expressed as: where is consumption, is investment, is government spending, and is net exports.

Aggregate Supply Content

Aggregate supply (AS) represents the total output firms are willing to produce at different price levels. It is divided into short-run (SRAS) and long-run (LRAS) supply.

• Key Point: SRAS is upward sloping due to sticky wages and prices; LRAS is vertical at potential GDP.

• Key Point: Shifts in AS can result from changes in input prices, technology, or labor force.

Macroeconomic Equilibrium

Macroeconomic equilibrium occurs where aggregate demand equals aggregate supply, determining the overall price level and real GDP.

• Key Point: Equilibrium can be short-run (where AD intersects SRAS) or long-run (where AD, SRAS, and LRAS intersect).

• Example: A negative demand shock shifts AD left, causing lower output and price level in the short run.

Appendix: Schools of Thought

Different schools of macroeconomic thought interpret aggregate demand and supply dynamics in distinct ways.

• Key Point: Classical economists emphasize long-run neutrality of money and flexible prices.

• Key Point: Keynesian economists focus on short-run fluctuations and sticky prices.

• Key Point: Monetarists stress the importance of monetary policy and control of money supply.

Chapter 14: Money, Banks, and the Federal Reserve System

What is Money & Why Do We Need It?

Money is any item that is widely accepted as payment for goods and services. It serves as a medium of exchange, unit of account, and store of value.

• Key Point: Money eliminates the inefficiencies of barter by providing a common measure of value.

• Key Point: The three functions of money are essential for economic activity.

How is Money Measured in the United States

The U.S. measures money supply using monetary aggregates: M1 and M2.

• Key Point: M1 includes currency, demand deposits, and other checkable deposits.

• Key Point: M2 includes M1 plus savings deposits, small time deposits, and money market funds.

• Table: Main components of M1 and M2:

How Do Banks Create Money

Banks create money through the process of accepting deposits and making loans, which increases the money supply via the money multiplier.

• Key Point: Fractional reserve banking allows banks to lend a portion of deposits, creating new money.

• Formula: The money multiplier is:

• Example: With a reserve ratio of 10%, the money multiplier is .

The Federal Reserve System

The Federal Reserve (the Fed) is the central bank of the United States, responsible for regulating the money supply and ensuring financial stability.

• Key Point: The Fed conducts monetary policy, supervises banks, and acts as lender of last resort.

• Key Point: The Fed is composed of the Board of Governors, 12 regional banks, and the Federal Open Market Committee (FOMC).

Chapter 15: Monetary Policy

What is Monetary Policy

Monetary policy refers to actions by the central bank to manage the money supply and interest rates to achieve macroeconomic objectives.

• Key Point: Main goals include price stability, full employment, and economic growth.

• Key Point: Tools include open market operations, discount rate, and reserve requirements.

Monetary Policy and Economic Activity

Monetary policy influences aggregate demand by affecting borrowing costs, investment, and consumer spending.

• Key Point: Lower interest rates stimulate economic activity; higher rates restrain inflation.

• Formula: The transmission mechanism links policy rates to aggregate demand:

Fed Policies During 2007-2009 Recession

During the Great Recession, the Fed implemented unconventional policies to stabilize the economy.

• Key Point: The Fed lowered the federal funds rate to near zero and used quantitative easing to inject liquidity.

• Key Point: Emergency lending facilities were established to support financial institutions.

• Example: The Fed purchased large quantities of Treasury and mortgage-backed securities to lower long-term interest rates.