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  2. Circular flow of income - Wikipedia

    en.wikipedia.org/wiki/Circular_flow_of_income

    The four-sector model adds the foreign sector to the three-sector model. [17] [18] [23] (The foreign sector is also known as the "external sector," the "overseas sector," [19] or the "rest of the world.") Thus, the four-sector model includes (1) households, (2) firms, (3) government, and (4) the rest of the world. It excludes the financial sector.

  3. Sector model - Wikipedia

    en.wikipedia.org/wiki/Sector_model

    A basic version of the Sector model. The sector model, also known as the Hoyt model, is a model of urban land use proposed in 1939 by land economist Homer Hoyt. [1] It is a modification of the concentric zone model of city development. The benefits of the application of this model include the fact it allows for an outward progression of growth.

  4. Porter's five forces analysis - Wikipedia

    en.wikipedia.org/wiki/Porter's_five_forces_analysis

    Porter's Five Forces Framework is a method of analysing the competitive environment of a business. It draws from industrial organization (IO) economics to derive five forces that determine the competitive intensity and, therefore, the attractiveness (or lack thereof) of an industry in terms of its profitability. An "unattractive" industry is ...

  5. Three-sector model - Wikipedia

    en.wikipedia.org/wiki/Three-sector_model

    The three-sector model in economics divides economies into three sectors of activity: extraction of raw materials , manufacturing , and service industries which exist to facilitate the transport, distribution and sale of goods produced in the secondary sector . [1] The model was developed by Allan Fisher, [2] [3] [4] Colin Clark, [5] and Jean ...

  6. Industry classification - Wikipedia

    en.wikipedia.org/wiki/Industry_classification

    At the top level, they are often classified according to the three-sector theory into sectors: primary (extraction and agriculture), secondary (manufacturing), and tertiary (services). Some authors add quaternary (knowledge) or even quinary (culture and research) sectors. Over time, the fraction of a society's activities within each sector changes.

  7. Economic sector - Wikipedia

    en.wikipedia.org/wiki/Economic_sector

    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.

  8. Development theory - Wikipedia

    en.wikipedia.org/wiki/Development_theory

    According to the linear stages of growth model, a correctly designed massive injection of capital coupled with intervention by the public sector would ultimately lead to industrialization and economic development of a developing nation. [3] The Rostow's stages of growth model is the most well-known example of the linear stages of growth model. [3]

  9. Feldman–Mahalanobis model - Wikipedia

    en.wikipedia.org/wiki/Feldman–Mahalanobis_model

    The First Five-Year Plan stressed investment for capital accumulation in the spirit of the one-sector Harrod–Domar model. It argued that production required capital and that capital can be accumulated through investment : the faster one accumulates capital through investment, the higher the growth rate will be.