Class 12 Economics - CBSE
Determination of Income and Employment
The chapter 'Determination of Income and Employment' in CBSE Class 12 Macroeconomics explores how equilibrium output, income, and employment levels are established in an economy. It builds upon Keynesian theory, focusing on Aggregate Demand (AD) and Aggregate Supply (AS). You will learn about consumption function, saving function, investment multiplier, and the crucial concept of equilibrium GDP. For board exams, this is a high-weightage numerical and theoretical chapter, often featuring comprehensive 4-to-6-mark questions on derivation of multiplier and deficient/excess demand adjustments.
Start Learning FreeKey Concepts
Aggregate Demand (AD)
Total demand for final goods and services in an economy during a given period, consisting of Consumption (C), Investment (I), Government Expenditure (G), and Net Exports (X-M).
Propensity to Consume (APC and MPC)
APC is the ratio of total consumption to total income, while MPC (Marginal Propensity to Consume) measures the change in consumption resulting from a change in income.
Investment Multiplier (k)
The ratio of change in income to the change in investment, showing how an initial increase in investment leads to a manifold increase in total income.
Deficient Demand
A situation where Aggregate Demand is less than Aggregate Supply at full employment level, leading to deflationary gaps and involuntary unemployment.
Excess Demand
A situation where Aggregate Demand exceeds Aggregate Supply at full employment level, resulting in inflationary gaps and price rises without any increase in actual output.
Important Formulas
Board Exam Info
In the CBSE Class 12 Economics board exam, this chapter typically carries around 10 to 12 marks. Questions frequently include numerical problems on calculating the investment multiplier and equilibrium income, along with theoretical questions on measures to correct excess and deficient demand using monetary and fiscal policies.
Frequently Asked Questions
Why is the 45-degree line important in the income-output model?
The 45-degree line represents Aggregate Supply (Y = AS), where at every point, output equals total income, serving as a benchmark to find equilibrium where it intersects the Aggregate Demand line.
Can the value of the multiplier be less than 1?
No, the value of the multiplier cannot be less than 1 because MPC lies between 0 and 1, making the minimum value of the multiplier equal to 1 (when MPC = 0).
What is the difference between voluntary and involuntary unemployment?
Voluntary unemployment occurs when a person is unwilling to work at the prevailing wage rate, whereas involuntary unemployment occurs when able and willing workers cannot find jobs at the existing wage rate.
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