‘What is economics? Over the last half-century, the study of economics has expanded to include a vast range of topics. What  are the major definitions of these growing subjects? 1 The important ones are that economics

• analyzes how a society’s institutions and technology affect prices and the allocation of resources among different uses.
• explores the behavior of the financial markets,including interest rates and stock prices.
• examines the distribution of income and suggests ways that the poor can be helped without harming the performance of the economy.
• studies the business cycle and examines. how monetary policy can be used to moderate the swings in unemployment and inflation.
• studies the patterns of trade among nations and analyzes the impact of trade barriers.
• looks at growth in developing countries and proposes ways to encourage the efficient use of resources.
• asks how government policies can be used to pursue important goals such as rapid economic growth, efficient use of resources, full employment,price stability,.and a fair distribution of income.

This list is a good one, yet you could extend it many times over. But if we boil down all these definitions,we find one common theme:

Economics the study of how societies use scarce resources to produce valuable commodities and distribute them among different people.

Behind this definition are two Key ideas in economics:that goods are scarce and that society must use its resources efficiently. Indeed, economics is an important subject because of the fact of scarcity and the desire for efficiency.

Consider a world without scarcity. If infinite quantities of every good could be produced or if hu-

This list contains several specialized terms from economics.To master the ,subject. you will need tel understand its vo-cabularv, If you are not familiar with ” particular word phrase, you should consult the Glossary at the back of this ‘book. The Glossary contains most of the major technical economic terms used in this book. All terms printed in boldface are defined in the desires were fully satisfied, what would be the consequences? People would not worry about stretching out their limited incomes because the)”could have everything they wanted; businesses would not need to fret over the cost of labor or health care;governments would not need to struggle over taxes or spending or pollution because nobody would care.Moreover, since all of us could have as much as we pleased, no one would be concerned about the distribution of incomes among different people or classes.

In such an Eden of affluence, all goods would be free, like sand in the desert or seawater at the beach.All prices would be zero, and markets would be unnecessary. Indeed, economics would no longer be a useful subject.

But no society has reached a utopia of limitless possibilities. Ours is a world of scarcity. full of economic goods_A situation of scarcity is .one in which goods are limited relative to desires. An objective observer ‘would have to agree that, even after two centuries of rapid economic growth, production in’ the United States is simply not high enough to meet everyone’s desires. If you add up all the wants, you quickly find that there are simply not enough goods and services to satisfy even a small fraction of everyone’s consumption desires. Our national output would have to be many times larger before the average
American could live at the level of the average doctor or big-league baseball player. Moreover, outside the United States, particularly in Africa and Asia,hundreds of millions of people suffer from hunger and material deprivation.

Given unlimited wants, it is important that an economy make the best use of its limited resources. That brings us to the critical notion, of efficiency.Efficiency denotes the most effective use of a society’s resources in satisfying people’s wants and needs,By contrast, consider an economy with unchecked monopolies or unhealthy pollution or unwarranted government interference. Such an economy may produce less than would be possible without these factors, or it may produce a distorted bundle of goods that leaves consumers worse off than they otherwise could be-either situation is an inefficient allocation -of resources.

In economics.we say that an economy is producing efficiently when it cannot make anyone economical better off without making someone else worse off.

The essence of economics is to acknowledge the reality of scarcity and then figure out how to organize society in a way which produces the most efficient use of resources. That is where economics makes its unique contribution.

Microeconomics and Macroeconomics
Adam Smith is usually considered the founder of the field of microeconomics, the branch of economics which today is concerned with the behavior of individual entities such as markets, firms, and households. In TM Wealth of Nations (1776), Smith considered how individual prices are set, studied the determination of prices of land, labor, and capital, and inquired into the strengths and weaknesses of the market mechanism. Most important, he identified the remarkable efficiency properties of markets and saw that economic benefit comes from the self-interested actions of individuals. These remain important.issues today, and while the study of microeconomics has surely advanced greatly since Smith’s day, he is still cited by politicians and economists alike.

The other major branch of our subject is macroeconomics,which is concerned with the overall performance of the economy. Macroeconomics did not even exist in its modern form until 1935, when John Maynard Keynes published his revolutionary General Theory of Employment, Interest and Money. At the time,England and the United States were still stuck in the Great Depression of the 1930s, with over one-quarter of the American labor force ‘unemployed. In his new theory Keynes developed an analysis of what causes business cycles, with alternating spells of high unemployment and high inflation. Today, macroeconomics examines a wide variety of areas, such as how total investment and consumption are determined, how central banks manage money and interest rates, what causes international financial crises, and whysome nations grow rapidly while others stagnate.Although macroeconomics. has progressed far since his first insights, the issues addressed by Keynes still define the study of macroeconomics today.The two branches-microeconomics and macroeconomics-converge to form the core of modern economics.

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