Chapter 19. What Macroeconomics Is All About. In this chapter you will learn to. Key Macroeconomic Variables. Output and Income
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1 Chapter 19 What Macroeconomics Is All About In this chapter you will learn to 1. Describe the meaning and importance of the key macroeconomic variables, including national income, unemployment, inflation, interest rates, exchange rates, and trade flows. 2. Explain that most macroeconomic issues are about longrun trends or short-run fluctuations, and that government policy is relevant for both Key Macroeconomic Variables Output and Income The production of output generates income. To measure total output in dollars, we add up the values of the many different goods produced. This gives nominal national income (in current dollars). Using base-period prices, we get real national income (in constant dollars)
2 Figure 19.1 Growth and Fluctuations in Real GDP, Movements in Real GDP Real GDP fluctuates around a rising trend: - the trend shows long-run economic growth - the short-run fluctuations show the business cycle APPLYING ECONOMIC CONCEPTS 19.1 The Terminology of Business Cycles 19-5 Potential Output and the Output Gap Potential output is what the economy could produce if all resources were employed at their normal levels of utilization - often called full-employment output The output gap measures the difference between potential output and actual output. Output Gap = Y-Y* When Y < Y*, there is a recessionary gap. When Y > Y*, there is an inflationary gap
3 Figure 19.2 Potential GDP and the Output Gap, Employment, Unemployment, and the Labor Force Employment: the number of workers (16+) who hold jobs. Unemployment: the number who are not employed but are actively looking for a job. Labor force: the total number of employed + unemployed. The unemployment rate is the number of unemployed expressed as a percentage of the labour force Unemployment Rate Unemployment Rate = Number of people unemployed Number of people in the labor force X 100 Even when Y = Y*, some unemployment exists: frictional unemployment structural unemployment
4 Full and Cyclical Unemployment The unemployment rate when Y=Y* is called full employment. Cyclical unemployment is neither structural or frictional - changes with the ebb and flow of the business cycle Why Does Unemployment Matter? Some unemployment is desirable, as it reflects the time required for workers and firms to find each other so that good matches are made. But some unemployment is associated with human hardship, especially for those individuals with skills that are not in high demand by firms Figure 19.3 Labor Force, Employment, and Unemployment, Productivity Productivity: a measure of output per unit of input - often measured as GDP per worker (labor productivity) - or GDP per hour of work Increases in productivity are probably the single largest determinant of long-run increases in material living standards
5 Figure 19.4 Labor Productivity, Inflation and the Price Level The price level: the average level of all prices in the economy. Inflation: the rate at which the price level is changing. The CPI is based on the price of a typical consumption basket, relative to the price in some base year: CPI t = P Q t P Q Inflation Matters APPLYING ECONOMIC CONCEPTS 19.2 How the CPI Is Constructed Why Inflation Matters The purchasing power of money is negatively related to the price level. Also, because it is hard to forecast accurately, inflation adds to the uncertainties of economic life
6 Table 19.1 Expenditure Behavior in Table Expenditure Behavior at 2007 Prices Figure 19.5 The Price Level and the Inflation Rate,
7 Interest Rates The interest rate is the price of borrowing funds the percentage amount per period. Nominal interest rate: the rate expressed in money terms. Real interest rate: the rate expressed in terms of purchasing power. The burden of borrowing depends on the real interest rate Figure 19.6 Real and Nominal Interest Rates, The International Economy Foreign exchange: foreign currencies or claims on foreign currencies. Exchange rate: the number of U.S. dollars required to purchase one unit of foreign currency. An appreciation of the U.S. dollar means that a U.S. dollar buys more foreign currency -a risein the exchange rate A depreciation of the U.S. dollar means that a U.S. dollar buys less foreign currency - a fall in the exchange rate
8 Figure 19.7 U.S. Dollars Needed to Purchase A Euro, Exports and Imports The balance of payments accounts record all payments made in international transactions goods, services, and assets: - trade balance (exports imports) - current account balance - capital account balance For the U.S., the increasing role of international trade is an important aspect of globalization Figure 19.8 Imports, Exports, and Net Exports,
9 Growth Versus Fluctuations Long-Term Economic Growth Long-term growth is considerably more important for a society s living standards from decade to decade than shortterm fluctuations. There is considerable debate regarding the ability of government to influence the economy s long-run growth rate Short-Term Fluctuations Short-term fluctuations are often called business cycles. Economists debate the effectiveness of monetary and fiscal policy in influencing these fluctuations. Some economists argue that despite the power of policy to affect the economy, governments should not attempt finetuning What Lies Ahead? To organize our thinking about macroeconomics, we must develop some tools. These will include: discussing the measurement of national income building a simple model of the economy modifying the model to make it more realistic using our model to analyze some pertinent economic issues
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