Portal:Business and economics

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The New York Stock Exchange floor

In the social sciences, economics is the study of human choice behavior and the methodology used to make associated investment and production decisions; in particular, though not limited to, how those choices and decisions determine the allocation of scarce resources and their effect on production, distribution, and consumption. The word "economics" is from the Greek words οἶκος [oikos], meaning "family, household, estate", and νέμω [nemo], or "distribution, allocation", and hence literally means "household management" or "management of the state". An economist is a person using economic concepts and data in the course of employment, or someone who has earned a university degree in the subject. Economics undergraduate courses always cover at least the two main branches:

  • Microeconomics studies the behavior of individual households and firms in making decisions on the allocation of limited resources. Microeconomics applies to markets where goods or services are bought and sold. It examines how decisions and behaviors affect the supply and demand for goods and services, which determines prices, and how prices, in turn, determine the quantity supplied and quantity demanded of goods and services.
  • Macroeconomics deals with the performance, structure, behavior, and decision-making of an economy as a whole, rather than individual markets. This includes national, regional, and global economies.

There are also other sub-fields of economics.

In economics, economic systems is the study and analysis of organizing production, distribution, consumption and investment and the study of optimal resource allocation and institutional design. Traditionally the study of economic systems was based on a dichotomy between market economies and planned economies, but contemporary studies compare and contrast a number of different variables, such as ownership structure (Public, Private or Collective), economic coordination (planning, markets or mixed), management structure (Hierarchy versus adhocracy), the incentive system, and the level of centralization in decision-making. An economy can be analyzed in terms of its economic sectors, the classic breakdown being into primary, secondary and tertiary. A business, also known as an enterprise or a firm, is an organization involved in the trade of goods, services, or both to consumers. Businesses are prevalent in capitalist economies, where most of them are privately owned and provide goods and services to customers in exchange of other goods, services, or money. Businesses may also be not-for-profit or state-owned. Management in business and organizations is the function that coordinates the efforts of people to accomplish goals and objectives using available resources efficiently and effectively. Management comprises planning, organizing, staffing, leading or directing, and controlling an organization or initiative to accomplish a goal. Management is also an academic discipline, and is traditionally taught at business schools. Economic policy refers to the actions that governments take in the economic field. It covers the systems for setting interest rates and government budget as well as the labor market regulations, national ownership, trade policy, monetary policy, fiscal policy, regulatory policy, anti-trust policy and industrial policy. In economics, sustainable development refers to development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Selected article

Quarrymen splitting slate at Dinorwig Quarry, Wales c. 1910

The slate industry in Wales began during the Roman period when slate was used to roof the fort at Segontium, modern Caernarfon. The slate industry grew slowly until the early 18th century, from when it expanded rapidly and reached its peak output in the late 19th century, at which time the most important slate producing areas were in north-west Wales. These included the Penrhyn Quarry near Bethesda, the Dinorwig Quarry near Llanberis, the Nantlle Valley quarries and Blaenau Ffestiniog, where the slate was mined rather than quarried. Penrhyn and Dinorwig were the two largest slate quarries in the world, and the Oakeley mine at Blaenau Ffestiniog was the largest slate mine in the world. The Great Depression and the Second World War led to the closure of many smaller quarries, and competition from other roofing materials, particularly tiles, resulted in the closure of most of the larger quarries in the 1960s and 1970s. Slate production continues on a much reduced scale.


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Great Fish Market by Jan Brueghel the Elder.
Photo credit: Genghiskhanviet

A fish market is a marketplace used for marketing fish products. It can be dedicated to wholesale trade between fishermen and fish merchants, or to the sale of seafood to individual consumers, or to both. Retail fish markets, a type of wet market, often sell street food as well.

Fish markets range in size from small fish stalls to the great Tsukiji fish market in Tokyo, turning over about 660,000 tonnes a year.

Selected economy

Ohio quarter, reverse side, 2002.jpg

The economy of Ohio nominally would be the 25th largest global economy behind Sweden and ahead of Nigeria according to the 2013 World Bank projections, and the 24th largest global economy behind Sweden and ahead of Norway according to the 2013 International Monetary Fund projections. The state had a projected GDP of $526.1 billion in 2013, up from 517.1 in 2012, and up from 501.3 in 2011, according to the Bureau of Economic Analysis. In 2013, Ohio was ranked in the top ten states for best business climate by Site Selection magazine, based on a business-activity database. The state was edged out only by Texas and Nebraska for the 2013 Governor's Cup award from the magazine, based on business growth and economic development. A new report by the Quantitative Economics and Statistics Practices (QUEST) of Ernst & Young in conjunction with the Council On State Taxation (COST), ranks Ohio as third in the nation for friendliest tax environment.


Selected quote

"This essay has been devoted to an exposition and elaboration of a single syllogism: given that the structure of an econometric model consist of optimal decision rules of economic agents, and that optimal decision rules vary systematically with changes in the structure of series relevant to the decision maker, it follows that any change in policy will systematically alter the structure of econometric models.

For the question of short-term forecasting, or tracking ability of econometric models, we have seen that this conclusion is of only occasional significance. For issues involving policy evaluation, in contrast, it is fundamental; for it implies that comparisons of the effects of alternative policy rules using current macro-econometric models are invalid regardless of the performance of these models over the sample period or in ex-ante short-term forecasting."

Robert Lucas, Econometric Policy Evaluation: A Critique, 1976
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