--- type: "Chapter" knowledge_type: "chapter" entity_type: "chapter" id: "66defad83f8b4e9e69bdc81b" title: "Determination Of Income And Employment" board: "CBSE" curriculum: "CBSE" class: "Class 12" subject: "Economics" book: "Introductory Macroeconomics" chapter: "Determination Of Income And Employment" chapter_slug: "determination-of-income-and-employment" canonical_url: "https://www.edzy.ai/cbse-class-12-economics-introductory-macroeconomics-determination-of-income-and-employment" markdown_url: "https://www.edzy.ai/okf/chapter/cbse-class-12-economics-introductory-macroeconomics-determination-of-income-and-employment.md" source_type: "examSubjectBookChapter" source_id: "66defad83f8b4e9e69bdc81b" source_pdf: "https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/2afa0e8e-28a1-4af4-8941-e1864c906a42.pdf" source: "Edzy" version: 1 last_updated: "2026-06-20" --- # Determination Of Income And Employment This chapter discusses the determination of national income, price level, and employment using models based on Keynesian economics. It focuses on aggregate demand, the components influencing it, and the conceptual frameworks for understanding income determination in a structured economy. --- ## Knowledge Snapshot | Field | Details | | :--- | :--- | | Class | Class 12 | | Subject | Economics | | Book | Introductory Macroeconomics | | Chapter | Determination Of Income And Employment | | Pages | 53-65 | --- ## Chapter Summary ### Short Summary The chapter examines how various economic variables are determined, particularly focusing on national income and employment levels through the lens of aggregate demand and its components. ### Detailed Summary The chapter begins with an introduction to macroeconomic models and their role in explaining national income, price levels, and employment. It outlines the significance of aggregate demand and differentiates between planned (ex ante) and actual (ex post) measures of consumption and investment. The consumption function is introduced, detailing the relationship between consumption and income with the concept of marginal propensity to consume (MPC). It also explains investment definitions and their influence on aggregate demand. The two-sector model illustrates the interplay between consumption and investment in determining national income. Finally, the chapter addresses the conditions for equilibrium income and their implications for employment, highlighting the differences between short-run equilibrium and full employment. --- ## Topic-Wise Explanation ### AGGREGATE DEMAND AND ITS COMPONENTS This section describes how aggregate demand is composed of consumption, investment, and other components that determine the overall demand for goods and services in the economy. ### DETERMINATION OF INCOME IN TWO-SECTOR MODEL Focuses on the two-sector model without government influence, showing how consumption and investment together affect the determination of income through aggregate demand equations. ### DETERMINATION OF EQUILIBRIUM INCOME IN THE SHORT RUN Explores the dynamics of achieving equilibrium in the economy with fixed price levels and how equilibrium is analyzed through demand and supply interactions. ### SOME MORE CONCEPTS Discusses employment levels and how they relate to equilibrium output, including concepts of deficient and excess demand and their effects on production and prices. --- ## Core Ideas | Idea | Explanation | | :--- | :--- | | Consumption Function | Describes the relationship between consumer spending and income levels, incorporating both autonomous and induced consumption. | | Aggregate Demand | The total demand for goods and services in the economy, influenced by consumption and investment. | | Equilibrium Income | The level of output where planned spending equals actual production, essential for understanding employment levels. | --- ## Key Concepts | Concept | Meaning | | :--- | :--- | | Ex Ante | Planned values for consumption and investment, indicating what is expected. | | Ex Post | Actual received values for consumption and investment, indicating what has occurred. | | Marginal Propensity to Consume (MPC) | The change in consumption resulting from a change in income, crucial for determining consumption functions. | | Marginal Propensity to Save (MPS) | The fraction of additional income that is saved, defined as MPS = 1 - MPC. | --- ## Important Points for Revision * Understanding the distinction between ex ante and ex post variables. * The role of MPC and MPS in consumption and saving behavior. * The formulation of the consumption function and its implications. * How investments contribute to aggregate demand and economic growth. * The conditions necessary for macroeconomic equilibrium with fixed price levels. * The difference between short-run equilibrium and full employment. * Effects of deficient demand leading to unemployment. * Implications of excess demand on price levels. --- ## Vocabulary and Glossary | Word / Phrase | Meaning | | :--- | :--- | | Autonomous Consumption | Consumption that occurs even when income is zero. | | Planned Investment | The expected amount of investment made by producers during a certain period. | | Inventory Investment | Changes in stock levels affecting overall production in the economy. | --- ## Practice Questions ### Short Answer Questions 1. What is the consumption function? 2. How does MPC affect consumer behavior? 3. Define autonomous consumption. 4. Explain the difference between planned and actual investment. 5. What are the conditions for equilibrium income? ### Long Answer Questions 1. Discuss the components of aggregate demand and their interactions. 2. Explain the significance of the two-sector model in determining national income. 3. Describe the impact of excess demand on equilibrium levels in the economy. --- ## Related Concepts * National Income Accounting * Fiscal Variables in Aggregate Demand --- ## Source Attribution | Field | Value | | :--- | :--- | | Source | Edzy | | Reference Type | examSubjectBookChapter | | Reference ID | 66defad83f8b4e9e69bdc81b | | Canonical URL | https://www.edzy.ai/cbse-class-12-economics-introductory-macroeconomics-determination-of-income-and-employment | | Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-12-economics-introductory-macroeconomics-determination-of-income-and-employment.md |