An overview of the 5 sector model in economics

Overview[ edit ] The circular flow of income is a concept for better understanding of the economy as a whole and for example the National Income and Product Accounts NIPAs. In its most basic form it considers a simple economy consisting solely of businesses and individuals, and can be represented in a so-called "circular flow diagram.

An overview of the 5 sector model in economics

C is the consumption function which indicates the relation between income and consumption expenditure. The consumption function is shown by the slope of the C curve in Fig. I is investment demand which is autonomous.

That is why, consumer goods and services are produced from total consumption expenditure and aggregate savings are invested in the production of capital goods.

We explain these two approaches one by one with the help of Figure 1 A and B. Equality of Aggregate Demand and Aggregate Supply: The equilibrium level of national income is determined at a point where the aggregate demand function curve intersects the aggregate supply function.

It is drawn by adding to the consumption function C the investment demand I. Suppose there is disequilibrium in aggregate supply and aggregate demand of the economy. Disequilibrium can be in either case, aggregate supply exceeding aggregate demand or aggregate demand exceeding aggregate supply.

How will the equilibrium level of income be restored in the two situations? First, take the case when aggregate supply exceeds aggregate demand. This is shown by OY2 level of income in Panel A of the figure.

Here aggregate output or supply is Y2E2 and aggregate demand is Y2k. At this income level OY2, consumers will spend Y2d on consumption goods and save dE2. But businessmen intend to make investment equal to dk in order to buy investment goods.

Therefore, the surplus output of goods worth kE2 accumulated by businessmen in the form of unintended inventories. In order to avoid further inventory accumulation, they will reduce production.

Key Industry Structure Concepts

As a result of the reduction in output, income and employment will fall and the equilibrium level of income will be restored at OY where the aggregate supply equals aggregate demand at point E.

The second situation of disequilibrium when aggregate demand exceeds aggregate supply is shown by the income level of OY1 in Panel A of the figure. Here the aggregate demand is Y1E1 and the aggregate output is Y1a. At this income level, consumers spend Y1b on consumption goods and save ba.

But businessmen intend to invest bE, to buy investment goods. To meet this excess demand worth aE1, businessmen will have to reduce inventories by this amount. In order to stop further reduction in their inventories, businessmen will increase production.

As a result of the increase in production, output, income and employment will increase in the economy and the equilibrium level of income OY will be restored again at point E.

Equality of Saving and Investment: The equilibrium level of income can also be shown by the equality of the saving and investment functions. The saving and investment functions intersect at point E which determines the equilibrium level of income OY. If there is disequilibrium in the sense of inequality between saving and investment, forces will operate in the economy and the equilibrium position will be restored.

Suppose the income level is OY2 which is above the equilibrium income level OY. At this income level OY2, saving exceeds investment by gE2. It means that people are consuming and spending less.

An overview of the 5 sector model in economics

Thus aggregate demand is less than aggregate supply. This will lead to the accumulation of unintended inventories with businessmen. To avoid further accumulation of inventories, businessmen will reduce production. On the contrary, if the income level is less than the equilibrium level, investment exceeds saving.

This is shown by OY1 level of income when investment Y1E1 is greater than saving. The excess of intended investment over intended saving means that aggregate demand is greater than aggregate supply by eE1.The World Bank Group engagement with the country is structured around a model that provides development solutions adapted to the country, with an integral package of financial, knowledge and convening services.

An overview of the 5 sector model in economics

Mexico Overview; Mexico Overview «» Context; amounting to % of GDP, the public sector achieved a primary surplus . ADVERTISEMENTS: Two Sectors, Three Sectors and Four Sector Model of National Income Determination! Introduction: To simplify the analysis, it has been classified into a two-sector model, a three-sector model and a four-sector model.

ADVERTISEMENTS: First two sectors are related to a closed economy in which there is no foreign trade . In the five sector model the economy is divided into five sectors: 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.


How the Five Forces Work

The circular flow of income is a concept for better understanding of the economy as a whole and for example the National Income and or two sector circular flow of income model, and Gemma Kotula. "Using the circular flow of income model to teach economics in the middle school classroom." The Social Studies Unlike most editing & proofreading services, we edit for everything: grammar, spelling, punctuation, idea flow, sentence structure, & more.

Get started now! The 5‐Sector Model (III), and an overview of what the sector does for itself and for other sectors – the outcomes, both within the sector and across sectoral borders. The global South and East are taken into account throughout and explicitly discussed in some parts of the paper.

The Five Forces - Institute For Strategy And Competitiveness - Harvard Business School