Class 12 Economics - HARYANA
Determination of Income and Employment
The chapter 'Determination of Income and Employment' in Class 12 Economics forms the core of Macroeconomics. It explains how equilibrium output and employment levels are determined in an economy through the interaction of Aggregate Demand (AD) and Aggregate Supply (AS). Students study the consumption function, saving function, investment multiplier, and the crucial concepts of inflationary and deflationary gaps along with measures to correct them. This chapter is exceptionally important for the Haryana Board (BSEH) examinations as it features both conceptual theory questions and high-weightage numerical problems on the multiplier and equilibrium income.
Start Learning FreeKey Concepts
Aggregate Demand (AD)
The total value of final goods and services that all sectors of the economy are willing to purchase at a given level of income, comprising Consumption (C) and Investment (I).
Aggregate Supply (AS)
The total flow of goods and services produced in an economy, which is identically equal to National Income (Y) and is divided into Consumption (C) and Saving (S).
Propensity to Consume and Save
Average Propensity to Consume (APC) is consumption per unit of income, while Marginal Propensity to Consume (MPC) measures the change in consumption due to a change in income.
Investment Multiplier (k)
The ratio of change in national income (ΔY) to change in investment (ΔI), showing how an initial increase in investment leads to a manifold increase in total income.
Excess and Deficient Demand
Excess demand occurs when AD exceeds AS at full employment causing inflation, while deficient demand occurs when AD falls short of AS causing unemployment.
Important Formulas
Board Exam Info
In the Haryana Board (BSEH) Class 12 Economics exam, this chapter carries significant weightage of around 8 to 10 marks. Questions frequently appear as 1-mark objective questions, 3-4 mark conceptual short answers, and a compulsory 6-mark numerical problem on calculating equilibrium income or the investment multiplier.
Frequently Asked Questions
What is the difference between Ex-ante and Ex-post saving and investment?
Ex-ante refers to planned or intended saving and investment at the beginning of a period, whereas Ex-post refers to actual or realized saving and investment at the end of the period.
Can the value of the Investment Multiplier be infinity?
Yes, if the Marginal Propensity to Consume (MPC) is equal to 1, the denominator (1 - MPC) becomes zero, making the value of the multiplier infinity.
Why is the consumption curve not starting from the origin?
The consumption curve starts above the origin on the vertical axis because even when income is zero (Y=0), people must consume a minimum amount to survive, which is known as autonomous consumption.
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