1. Concept of Circular Flow 2. Concept and Measurement of National Income 3. Concept of GDP and National Income 4. Concept of Social Accounting (Environment  Concerns in National Income and Green Accounting) 5. Say’s Law of Market 6. Theory of National Income Determination-Classical Theory 7. Consumption Function and Psychological Law of Consumption 8. The Saving Function 9. Investment Function 10. Marginal Efficiency of Capital 11. Rate of Interest and its Theories 12. Principle of Effective Demand 13. Investment Multiplier 14. Theory of Accelerator 15. Trade Cycle 16. Inflation.