Class 12 Economics — Chapter 4: Determination of Income and Employment

What you'll learn

• ▸Ex-ante and Ex-post Concepts
• ▸Consumption Function
• ▸Marginal Propensity to Consume (MPC) and Average Propensity to Consume (APC)
• ▸Savings Function and Propensities to Save
• ▸Relationship between MPC and MPS
• ▸Autonomous Investment
• ▸Aggregate Demand (AD) in a Two-Sector Economy
• ▸Equilibrium Income Determination (AD-AS Approach)
• ▸Disequilibrium and Inventory Adjustment Mechanism

Chapter Summary

--- PAGE 1 --- 12105CH04 Chapter 4 Determination of Income and Employment We have so far talked about the national income, price level, rate of interest etc. in an ad hoc manner – without investigating the forces that govern their values. The basic objective of macroeconomics is to develop theoretical tools, called models, capable of describing the processes which determine the values of these variables. Specifically, the models attempt to provide theoretical explanation to questions such as what causes periods of slow growth or recessions in the economy, or increment in the price level, or a rise in unemployment. It is difficult to account for all the variables at the same time. Thus, when we concentrate on the determination of a particular variable, we must hold the values of all other variables constant. This is a stylisation typical of almost any theoretical exercise and is called the assumption of *ceteris paribus*, which literally means ‘other things remaining equal’. You can th…

Practice Questions from this Chapter

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1. Calculate my daily consumption habits? Get Solution →
2. Compare planned versus actual spending. Get Solution →
3. Explain how savings boost economies. Get Solution →
4. What does the term *ex post* represent in macroeconomics? Get Solution →
5. What is the definition of autonomous consumption (C̄)? Get Solution →
6. What is the formula for the Marginal Propensity to Consume (MPC)? Get Solution →
7. According to the text, what is the fundamental relationship between the Marginal Propensity to Consume (c) and the Marginal Propensity to Save (s)? Get Solution →
8. In the context of the chapter, what does the term 'investment' primarily refer to? Get Solution →

Did you know?

• 💡 Before coins, ancient Lydians used electrum nuggets, a natural gold-silver mix, as money.
• 💡 Roman engineers planned massive aqueducts that delivered water for hundreds of years.
• 💡 Honeybees save nectar to make honey, a food source for their entire hive.
• 💡 The concept of calculating a country's total economic output is less than 100 years old.
• 💡 Scientists often plan experiments meticulously, but unexpected results frequently occur.

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