Economic sectors Three-sector hypothesis Colin Clark Jean Fourastié Primary sector (raw materials) Secondary sector (manufacturing) Tertiary sector (services) Others suggested Quaternary sector Quinary sector By ownership Public sector Private sector Business sector Voluntary sector This figure illustrates the percentages of a country's economy made up by different sectors based on its level of income or development. The primary sector extracts raw materials. The secondary sector is the conversion of raw materials into manufactured goods. The tertiary sector is the provision of services rather than manufacture of goods. The figure illustrates that countries with higher levels of socio-economic development tend to have less of their economy made up of primary and secondary sectors and more emphasis in tertiary sectors. The less developed countries exhibit the inverse pattern.

An economy may include several sectors (also called industries), that evolved in successive phases. The ancient economy was mainly based on subsistence farming. The industrial revolution lessened the role of subsistence farming, converting it to more extensive and monocultural forms of agriculture in the last three centuries. Economic growth took place mostly in mining, construction and manufacturing industries. In the economies of modern consumer societies, services, finance, and technology — the knowledge economy — play an increasingly significant role.

In modern economies, there are four main sectors of economic activity:citation needed Primary sector of the economy: Involves the retrieval and production of raw materials, such as corn, coal, wood and iron. (A coal miner and a fisherman would be workers in the primary sector.) Secondary sector of the economy: Involves the transformation of raw or intermediate materials into goods e.g. manufacturing steel into cars, or textiles into clothing. (A builder and a dressmaker would be workers in the secondary sector.) Tertiary sector of the economy: Involves the supplying of services to consumers and businesses, such as baby-sitting, cinema and banking. (A shopkeeper and an accountant would be workers in the tertiary sector.) Quaternary sector of the economy: Involves the research and development needed to produce products from natural resources. (A logging company might research ways to use partially burnt wood to be processed so that the undamaged portions of it can be made into pulp for paper.) Note that education is sometimes included in this sector.

Other sectors include the Public sector or state sector Private sector or privately-run businesses Social sector or Voluntary sector Based on stage in production chain More details about the various phases of economic development follow. As this process was far from being homogeneous geographically, the balance between these sectors differs widely among the various regions of the world. See also North American Industry Classification System - a sample application of sector-oriented analysis This economics or finance-related article is a stub. You can help Wikipedia by expanding it.v · d · e