Name the two components of Aggregate Demand in a closed economy.

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Q. Name the two components of Aggregate Demand in a closed economy.

Punjab PsebCBSE Class XII Board 2020Subjective· 1mImportance★★★★★

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Concept understanding — Aggregate Demand Equilibrium

Aggregate Demand Equilibrium: The Economy's Balancing Act

Think of a seesaw. On one side sits everything people, firms, and the government want to buy. On the other side sits everything firms produce. When the seesaw is perfectly level — when total spending exactly matches total output — the economy is in equilibrium. That's the core idea.

But why should you care? Because when the seesaw tilts, real things happen. If spending exceeds output, prices rise (inflation). If output exceeds spending, factories shut down and people lose jobs. Equilibrium is the sweet spot where neither happens.

The Precise Meaning

In macroeconomics, Aggregate Demand (AD) is the total planned spending on final goods and services in an economy during a given period. Aggregate Supply (AS) is the total output firms plan to produce.

Equilibrium occurs where:

AD = AS

At this point, what buyers intend to spend exactly equals what sellers intend to produce. No unwanted inventories pile up, and no shortages force prices up. The economy is "at rest."

Y = C + I + G + (X - M)

This is the AD identity from your NCERT textbook. It tells you that total spending in the economy comes from four sources: households, firms, government, and foreigners (net of what we buy from them).

How Equilibrium Actually Works

Imagine a simple economy with only households and firms. Households earn income $Y$ from firms. They spend part of it on consumption $C$ and save the rest $S$ . Firms produce output and also invest $I$ (buying machines, building factories).

Equilibrium condition becomes:

Y = C + I

But households don't spend all their income. They save. So $C = Y - S$ . Substituting:

Y = (Y - S) + I

Which simplifies to:

S = I

Important

In equilibrium, planned savings must equal planned investment. This is the Keynesian cross condition. If people save more than firms invest, total spending falls short of output — inventories pile up, firms cut production, and income falls until savings and investment match again.

The 45° Line Diagram (Describe It)

Draw a graph with Aggregate Demand (AD) on the vertical axis and National Income (Y) on the horizontal axis.

Draw a 45° line from the origin. Every point on this line represents $AD = Y$ — the equilibrium condition.
Draw the AD curve (which is $C + I + G + (X-M)$ ). It slopes upward because as income rises, consumption rises.
Where the AD curve crosses the 45° line — that's the equilibrium point. …

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In a closed economy (no foreign trade), Aggregate Demand consists of Consumption Expenditure and Investment Expenditure only.

A closed economy is one that does not engage in international trade—no exports, no imports, no foreign sector. This simplifies the structure of Aggregate Demand considerably because we can ignore the external components that appear in an open economy.

Aggregate Demand represents the total planned spending on domestically produced goods and services at different price levels. To understand what drives this spending in a closed economy, we need to identify who is doing the spending and on what.

The Two Components

1. Consumption Expenditure ( $C$ )

This is household spending on final goods and services—everything from food and clothing to healthcare and entertainment. Consumption is typically the largest component of Aggregate Demand in most economies. It depends primarily on disposable income: as households earn more, they spend more, though not every additional rupee earned is spent (some is saved). The relationship between income and consumption is captured by the consumption function, often written as:

C = \bar{C} + bY

where $\bar{C}$ is autonomous consumption (spending even at zero income), $b$ is the marginal propensity to consume, and $Y$ is national income.

2. Investment Expenditure ( $I$ ) …

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Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

PSEB Punjab Class 12 (Commerce) 2024Set ANNUAL1 markMCQ
$Q. Read the following statements carefully. Statement 1 : Full employment is a situation where all those people who are willing and able to work at existing wage rate, got job without any difficulty. Statement 2 : Disguised unemployment is a situation in which people working on a task are less than required. In the light to the given statements, choose the correct alternative :$
(a) Statement 1 is true and Statement 2 is false
(b) Statement 1 is false and Statement 2 is true
(c) Both statements 1 and 2 are true
(d) Both Statements 1 and 2 are false
›Reveal solutionSolution

The correct option is: Statement 1 is true and Statement 2 is false.

Statement 1 correctly defines full employment — everyone willing and able to work at the existing wage gets a job. Statement 2 is false: disguised unemployment is a situation where more people are engaged on a task than are actually needed (so their marginal productivity is zero), not few …

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PSEB Punjab Class 12 (Commerce) 2024Set ANNUAL1 markMCQ
$Q. Who said supply creates its own demand ?$
(a) Adam Smith
(b) Robbins
(c) Marshal
(d) J.B. Say
›Reveal solutionSolution

The correct option is (d) J.B. Say.

The statement 'Supply creates its own demand' is Say's Law of Markets, propounded by the French classical economist Jean-Baptiste (J.B.) Say. It holds that the very act of production generates enough income to buy all tha …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 markMCQ
$Q. Deficient demand results in __________.$
(a) Excess Demand
(b) Inflationary gap
(c) Inflation
(d) Deflationary gap
›Reveal solutionSolution

The correct option is (d) Deflationary gap.

Deficient demand means aggregate demand is less than the aggregate supply needed for full employment. The shortfall of demand at the full-employment level is called the deflationary gap, and it causes unemployment, idle capacity and a tendency …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 markMCQ
$Q. In order to control deficient demand, government expenditure and deficit financing should be decreased. (True/False)$
(a) True
(b) False
›Reveal solutionSolution

The statement is False.

Deficient demand (a deflationary gap) is cured by raising aggregate demand. So fiscal policy should increase government spending and use deficit financing to pump purchasing power into the economy. Cutting government expenditure and deficit financing would reduce demand further and worsen the gap — that is the policy for excess demand. Henc …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 markMCQ
$Q. Which of the following type of unemployment is found in India ?$
(a) Seasonal unemployment
(b) Disguised unemployment
(c) Educated unemployment
(d) All of these
›Reveal solutionSolution

The correct option is (d) All of these.

India suffers from several kinds of unemployment: seasonal (farm work available only in certain seasons), disguised (more people engaged on a job, e.g. a family farm, than are actually needed), and educated (qualified yout …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 mark
$Q. What is the concept of involuntary unemployment ?$
›Reveal solutionSolution

Involuntary unemployment = willing workers cannot get jobs at the going wage.

Involuntary unemployment occurs when workers are ready to work at the prevailing wage rate but cannot find employment because of a shortage of jobs (deficient aggregate demand). It is distinct from voluntary unemployment, where a person choose …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 mark
$Q. What is the problem of deficient demand ?$
›Reveal solutionSolution

Deficient demand = aggregate demand below the full-employment level.

The problem of deficient demand exists when aggregate demand in the economy is less than aggregate supply at full employment. This shortfall (the deflationary gap) leads to falling output, rising unemployment and downward pressure on prices — the economy operates below its full-employment …

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PSEB Punjab Class 12 (Commerce) 2023Set ANNUAL1 mark
$Q. What is meant by jobless growth in India ?$
›Reveal solutionSolution

Jobless growth = output rises but employment does not.

Jobless growth describes economic growth in which national output and income increase, but employment grows little or not at all. It happens when growth is driven by capital-intensive techniques and productivity gains rather than labour-using expansion, so GDP rises while …

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Q.Name the two components of Aggregate Demand in a closed economy.

The Two Components

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