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Economics (/ ˌ ɛ k ə ˈ n ɒ m ɪ k s, ˌ iː k ə-/) [1] [2] is a social science that studies the production, distribution, and consumption of goods and services. [3] [4] Economics focuses on the behaviour and interactions of economic agents and how economies work.
The term economics was originally known as "political economy".This term evolved from the French Mercantilist usage of économie politique, which expanded the notion of economy from the ancient Greek concept of household management to the national level, as the public administration of state affairs.
An economic system, or economic order, [1] is a system of production, resource allocation and distribution of goods and services within a society. It includes the combination of the various institutions , agencies, entities, decision-making processes, and patterns of consumption that comprise the economic structure of a given community.
An example in economics is "If the price of milk falls, ceteris paribus, the quantity of milk demanded will rise." This means that, if other factors, such as deflation, pricing objectives, utility, and marketing methods, do not change, the decrease in the price of milk will lead to an increase in demand for it. [5]
The cross elasticity of demand is an economic concept that measures the relative change in demand of a good when another good varies in price. The formula to solve for the coefficient of cross elasticity of demand is calculated by dividing the percentage change in quantity demanded of good A by the percentage change in price of good B.
Public economics examines the design of government tax and expenditure policies and economic effects of these policies (e.g., social insurance programs). Urban economics, which examines the challenges faced by cities, such as sprawl, air and water pollution, traffic congestion, and poverty, draws on the fields of urban geography and sociology.
Models include simple theoretical models, often containing only a few equations, used in teaching and research to highlight key basic principles, and larger applied quantitative models used by e.g. governments, central banks, think tanks and international organisations to predict effects of changes in economic policy or other exogenous factors ...
Other economic concepts related to inflation include: deflation – a fall in the general price level; [17] disinflation – a decrease in the rate of inflation; [18] hyperinflation – an out-of-control inflationary spiral; [19] stagflation – a combination of inflation, slow economic growth and high unemployment; [20] reflation – an ...