Macro economics Essay Example For Students

Macro economics Essay Keynesian EconomicsMacroeconomics, branch of economics concerned with the aggregate, or overall, economy. Macroeconomics deals with economic factors such as total national output and income, unemployment, balance of payments, and the rate of inflation. It is distinct from microeconomics, which is the study of the composition of output such as the supply and demand for individual goods and services, the way they are traded in markets, and the pattern of their relative prices. At the basis of macroeconomics is an understanding of what constitutes national output, or national income, and the related concept of gross national product (GNP). The GNP is the total value of goods and services produced in an economy during a given period of time, usually a year. The measure of what a countrys economic activity produces in the end is called final demand. The main determinants of final demand are consumption (personal expenditure on items such as food, clothing, appliances, and cars), investment (spending by businesses on items such as new facilities and equipment), government spending, and net exports (exports minus imports). Macroeconomic theory is largely concerned with what determines the size of GNP, its stability, and its relationship to variables such as unemployment and inflation. The size of a countrys potential GNP at any moment in time depends on its factors of production-labor and capital-and its technology. Over time the countrys labor force, capital stock, and technology will change, and the determination of long-run changes in a countrys productive potential is the subject matter of one branch of macroeconomic theory known as growth theory. The study of macroeconomics is relatively new, generally beginning with the ideas of British economist John Maynard Keynes in the 1930s. Keyness ideas revolutionized thinking in several areas of macroeconomics, including unemployment, money supply, and inflation. Keynesian Theory and Unemployment Unemployment causes a great deal of social distress and concern; as a result, the causes and consequences of unemployment have received the most attention in macroeconomic theory. Until the publication in 1936 of The General Theory of Employment, Interest and Money by Keynes, large-scale unemployment was generally explained in terms of rigidity in the labor market that prevented wages from falling to a level at which the labor market would be in equilibrium. Equilibrium would be reached when pressure from members of the labor force seeking work had bid down the wage to the point where either some dropped out of the labor market (the supply of labor fell) or firms became willing to take on more labor given that the lower wage increased the profitability of hiring more workers (demand increased). If, however, some rigidity prevented wages from falling to the point where supply and demand for labor were at equilibrium, then unemployment could persist. Such an obstacle could be, for example, trade union action to maintain minimum wages or minimum-wage legislation. Keyness major innovation was to argue that persistent unemployment might be caused by a deficiency in demand for production or services, rather than by a disequilibrium in the labor market. Such a deficiency of demand could be explained by a failure of planned (intended) investment to match planned (intended) savings. Savings constitute a leakage in the circular flow by which the incomes earned in the course of producing goods or services are transferred back into demand for other goods and services. A leakage in the circular flow of incomes would tend to reduce the level of total demand. Real investment, known as capital formation (the production of machines, factories, housing, and so on), has the opposite effect-it is an injection into the circular flow relating income to output-and tends to raise the level of demand. Why Stealing Is Wrong essay The cost-push theory basically emphasized the role of excessive increases in wages relative to productivity increases as a cause of inflation, whereas the demand-pull theory tended to attribute inflation more to excess demand in the goods market caused by expansion of the money supply. A central concept in inflationary theory since the mid-1950s has been the Phillips curve, which relates the level of unemployment to the rate of inflation. The Phillips curve suggests that society can make a choice between various combinations of inflation rate and unemployment level. Many economists, however, dispute whether such a choice really exists, saying that in order to keep unemployment under control it will be necessary to accept continuously increasing inflation. At the same time many other economists dispute whether a stable relationship between unemployment and the level of real wage demands exists. Modern Theories During the last few decades there have been numerous refinements of the Keynesian theory of unemployment. For example, although there is still much disagreement as to the importance of wage rigidity, significant progress has been made in explaining it without recourse to trade union behavior or government regulation. At first it seemed difficult to reconcile the notion of wage rigidity with the usual economists assumption that people seek to maximize utility or satisfaction and would be willing to accept a lower wage in order to get a job. However, by widening the range of variables over which individuals optimize to include variables such as loyalty and self-respect, it has become easier to reconcile labor market disequilibrium with the usual assumptions of optimizing behavior. Macroeconomic theories regarding the way that the determinants of total final demand operate form the basis of large macroeconomic models of the economy that are used in economic forecasting to make predictions of output and employment and related variables. During the last few years, the record of most such predictions has been poor, and an analysis of the errors has led to continual revisions of the basic models and refinements of the theory. Phillips curve The Phillips curve illustrates the trade-off found by economist A. W. Phillips between lower unemployment and increased inflation. If unemployment is low at 4 percent, inflation is slightly high at 6 percent (point a). If inflation is eliminated, unemployment increases to 8 percent (point b). The trade-off poses a dilemma for policy-makers, although economists disagree on whether this relationship exists.