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The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. [1] This consists of information technology; media; research and development; information-based services such as information-generation and information-sharing; and knowledge-based services such as consultation, entertainment, broadcasting, mass ...
National and international statistical agencies use various industry-classification schemes to summarize economic conditions. Securities analysts use such groupings to track common forces acting on groups of companies, to compare companies' performance to that of their peers, and to construct either specialized or diversified portfolios.
Three sectors according to Fourastié Clark's sector model This figure illustrates the percentages of a country's economy made up by different sector. 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.
Three sectors according to Fourastié Clark's sector model. One classical breakdown of economic activity distinguishes three sectors: [1] Primary: involves the retrieval and production of raw-material commodities, such as corn, coal, wood or iron. Miners, farmers and fishermen are all workers in the primary sector.
In a statist model, a strong state is driving interactions between the three components in a top-down implementation. [13] It creates stronger ties and a more integrated model. In a laissez-faire model, in which the industry and market forces are the leading forces, the ties are weaker and each institution tends to remain very independent.
There is extensive literature on these models. The model has been extended to work with non-linear relationships between sectors. [7] There is the Hawkins–Simon condition on producibility. There has been research on disaggregation to clustered inter-industry flows, and on the study of constellations of industries.
This is necessitated by the demands of a tertiary and quaternary sector: in order to better service an industry focused on finance, education, communication, management, training, engineering, and aesthetic design, the city must become points of exchange capable of providing the most updated information from across the globe.
Rostow's model is descendent from the liberal school of economics, emphasizing the efficacy of modern concepts of free trade and the ideas of Adam Smith.It also denies Friedrich List’s argument that countries reliant on exporting raw materials may get “locked in”, and be unable to diversify, in that Rostow's model states that countries may need to depend on a few raw material exports to ...