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July 17, 2018 

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IMPORTS: Goods and services produced by the foreign sector and purchased by the domestic economy. In other words, imports are goods purchased from other countries. The United States, for example, buys a lot of the stuff produced within the boundaries of other countries, including bananas, coffee, cars, chocolate, computers, and, well, a lot of other products. Imports, together with exports, are the essence of foreign trade--goods and services that are traded among the citizens of different nations. Imports and exports are frequently combined into a single term, net exports (exports minus imports).

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TWO-SECTOR, THREE-MARKET CIRCULAR FLOW:

A circular flow model of the macroeconomy containing two sectors (business and household) and three markets (product, factor, and financial) that illustrates the continuous movement of the payments for goods and services between producers and consumers, with particular emphasis on saving, investment, and the role of financial markets. Other circular models are two-sector, two-market circular flow; three-sector, three-market circular flow; and four-sector, three-market circular flow.
The two-sector, three-market circular flow model highlights the key role that financial markets play in the economy. It expands the simple two-sector, two-market circular flow by illustrating how saving is diverted from consumption expenditures through financial markets and then used for investment expenditures. It illustrates that saving does not vanish from the economy, but is merely diverted. Of some importance, this diversion is a prime source of investment expenditures on capital goods.

Two Sectors, Three Markets

The two macroeconomic sectors included in this model are:
  • Household Sector: This includes everyone, all people, seeking to satisfy unlimited wants and needs. This sector is responsible for consumption expenditures. It also owns all productive resources.
  • Business Sector: This includes the institutions (especially proprietorships, partnerships, and corporations) that undertake the task of combining resources to produce goods and services. This sector does the production. It also buys capital goods with investment expenditures.
The three macroeconomic markets in this version of the circular flow are:
  • Product markets: This is the combination of all markets in the economy that exchange final goods and services. It is the mechanism that exchanges gross domestic product. The full name is aggregate product markets, which is also shortened to the aggregate market.
  • Resource markets: This is the combination of all markets that exchange the services of the economy's resources, or factors of production--including, labor, capital, land, and entrepreneurship. Another name for this is factor markets.
  • Financial Markets: The commodity exchanged through financial markets is legal claims. Legal claims represent ownership of physical assets (capital and other goods). Because the exchange of legal claims involves the counter flow of income, those seeking to save income buy legal claims and those wanting to borrow income sell legal claims.

Spotlight on Financial Markets

The two-sector, three-market circular flow model highlights the role played by the financial markets. Financial markets provide a mechanism for the business sector to acquire the income needed to purchase capital goods. The business sector acquires this income by selling legal claims through financial markets. On the other side of the financial markets, the household sector buys these legal claims. In so doing, it diverts a portion of income from consumption expenditures to saving.

Financial markets, as such, enable the addition of three key flows to the model--saving, investment expenditures, and investment borrowing. These flows divert, but do not destroy, a portion of the core flow of production, income, and consumption to the business sector.

Diverted Saving

Trading Legal Claims
Circular Flow


This diagram presents the two-sector, three-market circular flow. At the far left is the household sector, which contains people seeking consumption. At the far right is the business sector that does the production. At the top is the product markets that exchange final goods and services. At the bottom is the resource markets that exchange the services of the scarce resources. In the middle of the diagram, near the resource markets, is the financial markets.
  • Saving: With financial markets in place, the next step in the construction of the two-sector, three-market circular flow is saving. Saving is household sector income that is not used for consumption expenditures but rather is diverted to the financial markets. The household sector is on the buying side of financial markets. It diverts income when it buys legal claims. Click the [Saving] button to reveal this flow of saving from the household sector to the financial markets.

  • Investment Borrowing: Household saving does not stop when it reaches the financial markets. Financial markets are a conduit that diverts the flow of saving to the business sector. The business sector is on the borrowing side of the financial markets. By selling legal claims it borrows the income that can used for investment expenditures. Click the [Borrowing] button to highlight this flow from the financial markets to the business sector.

  • Investment Expenditures: The primary reason that the business sector borrows income through the financial markets is for investment expenditures on capital goods. Investment expenditures by the business sector then becomes the second basic expenditure on gross domestic product that flows through the product markets. Click the "Expenditures" button to highlight this flow from the business sector to the product markets.
Combining all three flows indicates the key role played by the financial markets. Saving flows from the household sector to the financial markets. It then emerges from the financial markets as investment borrowing and moves to the business sector. It then exits the business sector and heads to the product markets as investment expenditures. Click the [Complete Model] button to illustrate.

Income diverted away from consumption expenditures by the household sector finds its way back to the product markets as investment expenditures by the business sector.

What It All Means

The flow going into the financial markets is saving, income diverted away from consumption and supplied to the financial markets. The flow coming out of the financial markets is investment borrowing, income borrowed by the business sector to purchase capital goods, for business investment expenditures.

Summing up, consider three points:

  • First, including saving, investment, and financial markets in the circular flow model does not change the total volume of the circular flow. Gross domestic product, factor payments, and national income remain unchanged. Financial markets merely divert part of the flow away from consumption and to investment. It is the same basic diversion discussed in analysis of investment in the production possibilities model.

  • Second, in this model, saving diverted into financial markets is, in general, equal to the investment borrowing coming out, and thus investment expenditures by the business sector. In practice, however, there are periods in which saving is less than investment or investment is less than saving. These periods are not just curiosities, but are fundamental to the economy. Imbalances between saving and investment often trigger economic instability--business cycles, unemployment, and inflation--that underlies much of the study of macroeconomics.

  • Third, there is more to the financial markets that just business sector borrowing. In particular, the government sector is a frequent financial market borrower, as well. The government sector also issues legal claims through the financial markets as a means borrowing.

Other Models

This two-sector, three-market circular flow is one of four alternative circular flow models, each containing a different number of sectors or markets. The other three models are:
  • Two Sectors, Two Markets: The simplest circular flow model contains two sectors (household and business) and two markets (product and resource). This model highlights the core circular flow of production, income, and consumption.

  • Three Sectors, Three Markets: Another version of the model includes the government sector. This model highlights the importance of taxes, which are also diverted from household sector income and used to finance government purchases.

  • Four Sectors, Three Markets: The most comprehensive circular flow model includes the foreign sector. Adding the foreign sector highlights the role of trade with the rest of the world, especially exports and imports.

<= TWO-SECTOR KEYNESIAN MODELTWO-SECTOR, TWO-MARKET CIRCULAR FLOW =>


Recommended Citation:

TWO-SECTOR, THREE-MARKET CIRCULAR FLOW, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2018. [Accessed: July 17, 2018].


Check Out These Related Terms...

     | physical flow | payment flow | circular flow | two-sector, two-market circular flow | three-sector, three-market circular flow | four-sector, three-market circular flow |


Or For A Little Background...

     | paper economy | investment expenditures | saving | macroeconomic markets | product markets | resource markets | financial markets | macroeconomic sectors | household sector | business sector | production | consumption | investment | model | market | exchange | economy |


And For Further Study...

     | business cycles | macroeconomic goals | macroeconomic problems | macroeconomic theories | investment, production possibilities | unemployment | inflation |


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