CantillonEdit
Representation of Cantillon's primitive circular flow model[5]
One of the earliest ideas on the circular flow was explained in the work of 18th century Irish-French economist Richard Cantillon,[2] who was influenced by prior economists, especially William Petty.[6] Cantillon described the concept in his 1730 Essay on the Nature of Trade in General, in chapter 11, entitled "The Par or Relation between the Value of Land and Labor" to chapter 13, entitled "The Circulation and Exchange of Goods and Merchandise, as well as their Production, are Carried On in Europe by Entrepreneurs, and at a Risk." Thornton eds. (2010) further explained:
- Cantillon develops a circular-flow model of the economy that shows the distribution of farm production between property owners, farmers, and workers. Farm production is exchanged for the goods and services produced in the cities by entrepreneurs and artisans. While the property owners are “independent,” the model demonstrates the mutual interdependence between all the classes of people that Adam Smith dubbed the “invisible hand” in The Theory of Moral Sentiments (1759).[7]
Cantillon distinguished at least five types of economic agents: property owners, farmers, entrepreneurs, labors and artisans, as expressed in the contemporary diagram of the Cantillon’s Circular Flow Economy.[5]
Tableau économique
François Quesnay further developed these concepts, and was the first to visualize these interactions over time in the so called Tableau économique.[3] Quesnay believed that trade and industry were not sources of wealth, and instead in his 1758 book Tableau économique (Economic Table) argued that agricultural surpluses, by flowing through the economy in the form of rent, wages, and purchases were the real economic movers, for two reasons.
- First, regulation impedes the flow of income throughout all social classes and therefore economic development.
- Second, taxes on the productive classes such as farmers should be reduced in favor of higher taxes for unproductive classes such as landowners, since their luxurious way of life distorts the income flow.
The model Quesnay created consisted of three economic agents: The "Proprietary" class consisted of only landowners. The "Productive" class consisted of all agricultural laborers. The "Sterile" class is made up of artisans and merchants. The flow of production and/or cash between the three classes started with the Proprietary class because they own the land and they buy from both of the other classes. Quesnay visualised the steps in the process in the Tableau économique.
In Marxian economics, economic reproduction refers to recurrent (or cyclical) processes[8] by which the initial conditions necessary for economic activity to occur are constantly re-created.[9]
Economic reproduction involves the physical production and distribution of goods and services, the trade (the circulation via exchanges and transactions) of goods and services, and the consumption of goods and services (both productive orintermediate consumption and final consumption).
Karl Marx developed the original insights of Quesnay to model the circulation of capital, money, and commodities in the second volume of Das Kapital to show how the reproduction process that must occur in any type of society can take place in capitalist society by means of the circulation of capital.[10]
Marx distinguishes between "simple reproduction" and "expanded (or enlarged) reproduction".[11] In the former case, noeconomic growth occurs, while in the latter case, more is produced than is needed to maintain the economy at the given level, making economic growth possible. In the capitalist mode of production, the difference is that in the former case, the new surplus value created by wage-labour is spent by the employer on consumption (or hoarded), whereas in the latter case, part of it is reinvested in production.
Further developmentsEdit
The competitive price system adapted from Samuelson, 1961
The first to visualize the modern circular flow of income model was Frank Knight in 1933 publication of The Economic Organization.[12] Knight (1933) explained:
- [we may view the] economic organization as a system of prize relations. Seen in the large, free enterprise is an organization of production and distribution in which individuals or family units get their real income, their "living," by selling productive power for money to "business units" or "enterprises", and buying with the money income thus obtained the direct goods and services which they consume. This view, it will be remembered, ignores for the sake of simplicity the fact that an appreciable fraction of the productive power in use at any time is not really employed in satisfying current wants but to make provision for increased want-satisfaction in the future; it treats society as it would be, or would tend to become, with progress absent, or in a “static” state.[13]
Knight pictured a circulation of money and circulation of economic value between people (individuals, families) and business enterprises as a group,[14] explaining: "The general character of an enterprise system, reduced to its very simplest terms, can be illustrated by a diagram showing the exchange of productive power for consumption goods between individuals and business units, mediated by the circulation of money, and suggesting the familiar figure of the wheel of wealth."[15]
Two sector modelEdit
In the basic circular flow of income, or two sector circular flow of income model, the state of equilibrium is defined as a situation in which there is no tendency for the levels of income (Y), expenditure (E) and output (O) to change, that is:
Y = E = O
Two sector circular flow diagram
This means that the expenditure of buyers (households) becomes income for sellers (firms). The firms then spend this income on factors of productionsuch as labour, capital and raw materials, "transferring" their income to the factor owners. The factor owners spend this income on goods which leads to a circular flow of income.
This basic circular flow of income model consists of six assumptions:
- The economy consists of two sectors: households and firms.
- Households spend all of their income (Y) on goods and services orconsumption (C). There is no saving (S).
- All output (O) produced by firms is purchased by households through their expenditure (E).
- There is no financial sector.
- There is no government sector.
- There is no foreign sector
Three sector modelEdit
It includes household sector, producing sector and government sector. It will study a circular flow income in these sectors excluding rest of the world i.e. closed economy income. Here flows from household sector and producing sector to government sector are in the form of taxes. The income received from the government sector flows to producing and household sector in the form of payments for government purchases of goods and services as well as payment of subsides and transfer payments. Every payment has a receipt in response of it by which aggregate expenditure of an economy becomes identical to aggregate income and makes this circular flow unending.
Four sector modelEdit
A modern monetary economy comprises a network of four sector economy these are:
- Household sector
- Firms or Producing sector
- Government sector
- Rest of the world sector.
Each of the above sectors receives some payments from the other in lieu of goods and services which makes a regular flow of goods and physical services. Money facilitates such an exchange smoothly. A residual of each market comes in capital market as saving which inturn is invested in firms and government sector. Technically speaking, so long as lending is equal to the borrowing i.e. leakage is equal to injections, the circular flow will continue indefinitely. However this job is done by financial institutions in the economy.
Five sector modelEdit
Five Sector Circular Flow of Income Model
In the five sector model the economy is divided into five sectors:[16]
- Household sector
- Firms or Producing sector
- Financial sector : banks and non-bank intermediaries who engage in the borrowing (savings from households) and lending of money
- Government sector : consists of the economic activities of local, state and federal governments.
- Rest of the world sector: transforms the model from a closed economy to an open economy.
The five sector model of the circular flow of income is a more realistic representation of the economy. Unlike the two sector model where there are six assumptions the five sector circular flow relaxes all six assumptions. Since the first assumption is relaxed there are three more sectors introduced.
Leakage and injectionsEdit
In the five sector model the economy there is leakage and injections
- Leakage means withdrawal from the flow. When households and firms save part of their incomes it constitutes leakage. They may be in form of savings, tax payments, and imports. Leakages reduce the flow of income.
- injections means introduction of income into the flow.When households and firms borrow the savings,they constitute injections.Injections increase the flow of income.Injections can take the forms of (a) investment,(b) government spending and (c) exports.So long as leakages are equal to injections circular flow of income continues indefinitely.Financial institutions or capital market play the role of intermediaries.
Leakage and injections can occur in the financial sector, government sector and overseas sector:
- In the financial sector
In terms of the circular flow of income model the leakage that financial institutions provide in the economy is the option for households to save their money. This is a leakage because the saved money can not be spent in the economy and thus is an idle asset that means not all output will be purchased. The injection that the financial sector provides into the economy is investment (I) into the business/firms sector. An example of a group in the finance sector includes banks such as Westpac or financial institutions such as Suncorp.
- In the government sector
The leakage that the Government sector provides is through the collection of revenue through Taxes (T) that is provided by households and firms to the government. For this reason they are a leakage because it is a leakage out of the current income thus reducing the expenditure on current goods and services. The injection provided by the government sector is Government spending (G) that provides collective services and welfare payments to the community. An example of a tax collected by the government as a leakage is income tax and an injection into the economy can be when the government redistributes this income in the form of welfare payments, that is a form of government spending back into the economy.
- In the overseas sector
The main leakage from this sector are imports (M), which represent spending by residents into the rest of the world. The main injection provided by this sector is the exports of goods and services which generate income for the exporters from overseas residents. An example of the use of the overseas sector is Australia exporting wool to China, China pays the exporter of the wool (the farmer) therefore more money enters the economy thus making it an injection. Another example is China processing the wool into items such as coats and Australia importing the product by paying the Chinese exporter; since the money paying for the coat leaves the economy it is a leakage.
- Summary of leakage and injections
-
LEAKAGES | INJECTION |
Saving (S) | Investment (I) |
Taxes (T) | Government Spending (G) |
Imports (M) | Exports (X) |
- Table 1 All leakages and injections in five sector model
The state of equilibriumEdit
In terms of the five sector circular flow of income model the state of equilibrium occurs when the total leakages are equal to the total injections that occur in the economy. This can be shown as:
Savings + Taxes + Imports = Investment + Government Spending + Exports
OR
S + T + M = I + G + X.
This can be further illustrated through the fictitious economy of Martinland where:
S + T + M = I + G + X
$100 + $150 + $50 = $50 + $100 + $150
$300 = $300
Therefore since the leakages are equal to the injections the economy is in a stable state of equilibrium. This state can be contrasted to the state of disequilibrium where unlike that of equilibrium the sum of total leakages does not equal the sum of total injections. By giving values to the leakages and injections the circular flow of income can be used to show the state of disequilibrium. Disequilibrium can be shown as:
S + T + M ≠ I + G + X
Therefore it can be shown as one of the below equations where:
Total leakages > Total injections
$150 (S) + $250 (T) + $150 (M) > $75 (I) + $200 (G) + 150 (X)
Or
Total Leakages < Total injections
$50 (S) + $200 (T) + $125 (M) < $75 (I) + $200 (G) + 150 (X)
The effects of disequilibrium vary according to which of the above equations they belong to.
If S + T + M > I + G + X the levels of income, output, expenditure and employment will fall causing a recession or contraction in the overall economic activity. But if S + T + M < I + G + X the levels of income, output, expenditure and employment will rise causing a boom or expansion in economic activity.
Circular Flow of Income effects of saving
To manage this problem, if disequilibrium were to occur in the five sector circular flow of income model, changes in expenditure and output will lead to equilibrium being regained. An example of this is if:
S + T + M > I + G + X the levels of income, expenditure and output will fall causing a contraction or recession in the overall economic activity. As the income falls households will cut down on all leakages such as saving, they will also pay less in taxation and with a lower income they will spend less on imports. This will lead to a fall in the leakages until they equal the injections and a lower level of equilibrium will be the result.
The other equation of disequilibrium, if S + T + M < I + G + X in the five sector model the levels of income, expenditure and output will greatly rise causing a boom in economic activity. As the households income increases there will be a higher opportunity to save therefore saving in the financial sector will increase, taxation for the higher threshold will increase and they will be able to spend more on imports. In this case when the leakages increase they wisituation will be a higher level of equilibrium.
Difference between real flow and money flowEdit
- Real flow is the exchange of goods and services between household and firms whereas money flow is the monetary exchange between two sectors.
- In real flow household sector supplies raw material, land, labour, capital and enterprise to firms and in return firms sector provides finished goods and services to household sector. Whereas in money flow, firm sector gives remuneration in the form of money to household sector a wages and salaries, rent, interest etc.
- Difficulties of barter system for the exchange of goods and factor services between households and firms sector in real flow, whereas no such difficulty or inconvenience arise in money flow.
- When goods and services flow from one sector of the economy to another, it is known as real flow.
Phases or stages of circular flow of incomeEdit
Production, consumption expenditure and generation of income are the three basic economic activities of an economy that go on endlessly and are titled as circular flow of income. Production gives rise to income, income gives rise to demand for goods and services ; such a demand gives rise to expenditure and expenditure induces for further production. The whole process forms the basis for circular flow of income and related activities- production, income and expenditure are known as phases or stages of circular flow of income.
2 Comments:
Y=C+I+G
C=Y-T-S
S貯蓄、T租税、G政府購入、I投資
I G
S T
経済学のメソドロジー
シリーズ名
叢書ヒストリー・オヴ・アイディアズ ≪再検索≫
著者名等
F.H.ナイト/〔ほか〕著 ≪再検索≫
上山隆大/〔ほか〕訳 ≪再検索≫
出版
平凡社 1988.3
大きさ等
18cm 264p
NDC分類
331.2
件名
経済学-歴史 ≪再検索≫
書誌番号
3-0190275167
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