Topics
Microeconomic Theory
Microeconomics and Macroeconomics: Introduction
Demand and Law of Demand
- Role of Demand and Supply in Economics
- Paul A. Samuelson: Father of Modern Economics
- Concept of Demand
- Types of Demand
- Determinants of Demand
- Demand Function
- Law of Demand
- Demand Schedule
- Individual Demand Schedule
- Market Demand Schedule
- Demand Curve
- Individual Demand Curve
- Market Demand Curve
- Reasons for the Downward Slope of the Demand Curve
- Importance of the Law of Demand
- Exceptions to the Law of Demand
- Movement along the Demand Curve and Shift of the Demand Curve
- Change in Quantity Demanded: Movement along the Demand Curve
- Change in Demand – Shift in Demand Curve
- Difference Between Extension and Increase in Demand
- Difference Between Contraction and Decrease in Demand
Theory of Income and Employment
Money and Banking
Theory of Consumer Behaviour: Marginal Utility and Indifference Curve Analysis
- Basic Concepts of Microeconomics > Utility
- Cardinal Approach (Utility Analysis)
- Total Utility and Marginal Utility
- Relationship Between Total Utility and Marginal Utility
- Approaches to Consumer Behaviour
- Law of Diminishing Marginal Utility
- Alfred Marshall: Key Contributor to Economics
- Consumer's Equilibrium through Cardinal Utility Approach
- Law of Equi-Marginal Utility
- Importance and Limitations of law of Equi-Marginal Utility
- Ordinal Utility Analysis/Indifference Curve Analysis
- Relationship Between Marginal Rate of Substitution and Marginal Utility
- Properties of Indifference Curves
- Price Line or Budget Line
- Consumer's Equilibrium through Indifference Curve Approach
Balance of Payment and Exchange Rate
Elasticity of Demand
- Concept of Elasticity of Demand
- Types of Elasticity of Demand > Price Elasticity
- Methods of Measuring Price Elasticity of Demand
- Numerical Problems of Price Elasticity of Demand
- Factors Affecting Price Elasticity of Demand
- Importance of Elasticity of Demand
- Types of Elasticity of Demand > Income Elasticity
- Types of Elasticity of Demand > Cross Elasticity
Supply: Law of Supply and Price Elasticity of Supply
Public Finance
Market Mechanism: Equilibrium Price and Quantity in a Competitive Market
- Basic Concepts of Equilibrium and Equilibrium Price
- Equilibrium Price and Quantity in a Competitive Market
- Effect of Simultaneous change in Demand and Supply on Equilibrium Price
- Effects of Simultaneous Changes (Shifts) in Demand and Supply
- Some Special Cases of Equilibrium
- Applications of Tools of Demand and Supply Price Control
National Income
Laws of Returns: Returns to a Factor and Returns to Scale
- Basics of Production Theory
- Products
- Factors of Production
- Production Function
- Variation of Output in the Short-Run Returns to a Factor
- Relationship between Average Product (AP) and Marginal Product (MP)
- Relationship between Total Product (TP) and Marginal Product (MP)
- Changes in Production
- Law of Variable Proportions
- Three Stages of Production
- Explanation of the Law of Variable Proportions
- Stages of Operation and the Decision to Produce
- Variation of Output in the Long Run - Returns to Scale
- Law of Variable Proportions and Returns to Scale Compared
- Scale of Production and Concept of Indivisibility
- Economies of Scale
- Diseconomies of Scale
- Significance of Economies of Scale
Cost and Revenue Analysis
- Cost of Production
- Theories of Costs: Traditional Theory of Costs/Short Run Cost Curves
- Cost Concepts > Total Costs
- Cost Concepts > Average Cost
- Cost Concepts > Marginal Cost
- Costs in Long Run Period
- Difference Between Short - Run & Long Run Costs
- Behaviour of Cost in the Short - Run
- Relationship between Average and Marginal Cost
- Long-Run Cost Curves
- Revenue Concepts
- Types of Revenue
- Relation Between Total, Average and Marginal Revenue
- Relationship between Total, Average and Marginal Revenues under Perfect Competition
- Relationship between Total, Average and Marginal Revenue under Imperfect Competition
- Relationship Between (Mutual Determination) AR, MR, and Elasticity of Demand
- Comparative Study of Revenue Curves under Different Markets
- Significance of Revenue Curve
Forms of Market
- Concept of Market
- Market Structure
- Classification of Market Structure
- Perfect Competition
- Monopoly
- Monopolistic Competition
- Oligopoly
- Duopoly
- Bilateral Monopoly
- Concept of Monopsony
- Other Forms of Market
- Factors Determining Market / Extent of Market
- Demand Curves of Firms under Different Market Forms
- Comparison between different forms of market
Producer's Equilibrium
Equilibrium of Firm and Industry Under Perfect Competition
- Concept of Equilibrium in Economics
- Firm's Equilibrium
- Producer's (Firm's) Equilibrium: Total Revenue and Total Cost Approach
- Producer's (Firm's) Equilibrium: Marginal Revenue and Marginal Cost Approach
- Determination of Short Run Equilibrium of a Firm
- Firm is a Price Taker, Not a Price Maker
- Determination of Long Run Equilibrium of a Firm
- Equilibrium of Industry
- Difference Between Firm and Industry's Equilibrium
Producer's Equilibrium Under Perfect Competition
Determination of Equilibrium Price and Output Under Perfect Competition
- Perfect Competition
- Price Determination Under Perfect Competition
- Changes in Equilibrium
- Effect of Simultaneous change in Demand and Supply on Equilibrium Price
- Time Element in the Theory of Price Determination
- Determination of Equilibrium Prices
- Normal Price and Law of Returns
- Comparison between Market Price and Normal Price
- Practical Applications of Tools of Demand and Supply Analysis
- Determination of Short Run Equilibrium of a Firm
- Determination of Long Run Equilibrium of a Firm
Price Output Determination Under Monopoly
Price Output Determination Under Monopolistic Competition and Oligopoly
- Imperfect Competition
- Monopolistic Competition
- Equilibrium Price and Output under Monopolistic Competition
- Group Equilibrium in Monopolistic Competition
- Product Differentiation
- Selling Costs
- Oligopoly
- Price and Output Determination under Oligopoly
- Price Rigidity-Sweezy's Kinky Demand Curve Model or Equilibrium under Independent Action
- Cournot's Model
- Collusive Oligopoly
- Mergers
Theory of Income and Employment
- Basic Model of Income Determination
- Aggregate Demand and Its Components
- Propensity to Consume or Consumption Function
- Propensity to Save
- Investment Expenditure
- Determination of Equilibrium Income and Output
- Saving-investment Approach
- Investment Multiplier and Its Mechanism
- Solved Problems on Consumption and Income
- The Concept of Full Employment
- Important Terms of Employment and Unemployment
- Excess Demand
- Deficient Demand
Basic Concepts of Macro Economics
Aggregate Demand and Supply-Determinants of Equilibrium
Consumption Function (Propensity to Consume)
- Propensity to Consume or Consumption Function
- Kinds or Technical Attributes of Propensity to Consume > Average Propensity to Consume
- Kinds or Technical Attributes of Propensity to Consume > Marginal Propensity to Consume
- Propensity to Save
- Determinants of Propensity to Consume
- Psychological Law of Propensity to Consume
- Measures to Raise Propensity to Consume
Concept of Investments-Types and Determinants
Multiplier - I : Static and Dynamic
Full Employment and Voluntary Unemployment
Problems of Deficient Demand and Excess Demand
Measures to Correct Deficient and Excess Demand
Money: Meaning and Functions
Banks: Commercial Bank and Central Bank
- Concept of Bank
- Types of Bank
- Commercial Banks
- Banking > Functions of Commercial Bank
- Credit Creation by Commercial Banks
- Role of Commercial Banks in an Economy
- Central Bank
- Comparison Between Central Bank and Commercial Banks
- Central Bank as a Controller of Credit
- Methods of Credit Control
- Quantitative Methods
- Qualitative (Or Selective) Methods
Balance of Payment and Exchange Rate
- Concept of Balance of Payments
- Features of Balance of Payment
- Balance of Trade and Balance of Payments- Comparison
- Structure of Balance of Payment
- Methods to Measure Balance of Payments
- Components of Balance of Payments
- Current Account Transactions
- Capital Account Transactions
- Balance of Payments Always Balances
- Categories of Balance of Payments
- Balance of Payments Disequilibrium
- Measures to Correct Disequilibrium in the Balance of Payments
- Foreign Exchange Rate
- Exchange Rate
- Types of Foreign Exchange Rate
- Fixed Rate of Exchange
- Flexible Rate of Exchange
- Managed Floating Exchange Rate System
- Determination of Equilibrium Rate of Exchange
- Factors or Determinants of Foreign Exchange Rate
- Concepts of Depreciation, Appreciation, Devaluation and Revaluation
- Determination of Exchange Rate in a Free Market
Fiscal Policy
- Structure of Public Finance > Fiscal Policy
- Public Finance
- Instruments of Fiscal Policy
- Objectives of Fiscal Policy
- Miscellaneous Objectives of Fiscal Policy
- Fiscal Measures for Stabilisation
- Methods of Fiscal Policy in Developing Countries
- Limitations of Fiscal Policy
- Structure of Public Finance > Public Revenue
- Instruments of Fiscal Policy - Taxation
- Types of Taxes
- Tax Reforms in India
- Proportional, Progressive and Regressive Taxes
- Structure of Public Finance > Public Expenditure
- Importance of Public Expenditure
- Structure of Public Finance > Public Debt
- Reasons for Borrowing by the Government
- Public Debt - Redemption
- Deficit Financing
- Fiscal Policy in Action
Government Budget
- Budget
- Types of Budget
- Government Budget
- Need and Importance of Government Budget
- Types of Government Budget in India
- Components (Structure) of the Government Budget
- Modern Classification of Budget
- Classification of Budget Receipts
- Balanced Budget Vs Unbalanced Budget
- Zero-Base Budgeting (ZBB)
- Zero-Base Budgeting in India
- Concepts Related to Budget Deficits
- Constituents of budget /Structure of the budget
- Structure of Public Finance > Public Expenditure
- Revenue Expenditure and Capital Expenditure
- Developmental and Non-developmental Expenditure
- Tax Revenue
- Public Revenue > Non-tax Revenue
- Capital Receipts
- Objectives of Budget
- Significance of Budget
- Types of budget deficit
- Budgetary Procedure
National Income and Circular Flow of Income
- Concept of National Income
- Domestic Income
- National Income Aggregates
- Significance or Importance of National Income
- Circular Flow of Income
- Circular Flow in a Closed Economy
- Circular flow and the Equality between Production, Income and Expenditure
- Circular Flow in a Open Economy
- Economic Sectors of an Economy
- Two-Sector Model without Savings and Investment
- Two-Sector Model with Savings and Investment
- Three-Sector Model of Circular Flow of Income
- Four-Sector Model of Circular Flow of Income
- Significance or Importance of Circular Flow of Income
National Income Aggregates
- Key Relationships Among National Income Aggregates
- National Income Aggregates
- Gross Domestic Product at Market Price
- Gross National Product at Market Price
- Constituents of GNP
- Net Domestic Product at Market Price
- Difference between Net Domestic and Net National Product at Market Price
- Net National Product (NNP)
- Difference between Net National and Gross National Product at Market Price
- Net National Income or Product at Factor Cost
- Net Domestic Product or Income at Factor Cost
- Difference between Net Domestic Product at Factor Cost and Net Domestic Product at Market Price
- Gross Domestic Product or Income at Factor Cost
- Gross National Product at Factor Cost
- Factor Income from Net Domestic Product accuring to Private Sector
- Private Income
- Difference between National and Private Income
- Personal Income of National Income
- Difference between Private and Personal Income
- Disposable Income Aggregates
- Per Capita Income
- Real Income
- Interrelationship among National Income Aggregates
- Real GDP and Nominal GDP
- Gross Domestic Product (National Income) and Economic Welfare
Methods of Measuring National Income
- Concept of National Income
- Methods of Measurement of National Income
- Net Product or Value Added Method
- Precautions in the Estimation of National Income by Value-added Method
- Difficulties in the Estimation of National Income by Value-added Method
- Income Method
- Expenditure Method
- Precautions in the Estimation of National Income by Expenditure Method
- Alternative Methods of National Income Estimation
- Reconciling The Three Methods Of Estimating National Income
- The Identity of Output, Income and Expenditure
- Transactions Included in National Income
- Components of Net National Product at Factor Cost in its Three Phases
- Transactions not Included in National Income
- Significance of three Methods
- Numericals on Income, Product and Expenditure Method
National Income and Economic Welfare
- Welfare Economics
- Definitions of Welfare Economics
- Factors Determining the Size of National Income
- National Income and National Welfare
- Relation between Economic Welfare and National Income
- National Income as a Measure of Economic Welfare
- Causes of Slow Growth of National Income
- Suggestions for Increasing National Income
- Introduction
- Bank Rate
- Repo Rate & Reverse Repo Rate
- Monetary Policy Committee
- Open Market Operations
- Cash Ratio Reserve
- Statutory Liquidity Ratio
- Key Points: Quantitative Methods
Introduction
Quantitative Methods
Affect the total volume of credit — all sectors equally, without discrimination. Focus of this note.
Bank Rate
The Bank Rate is the minimum rate of interest at which the RBI lends money to commercial banks or rediscounts their approved bills of exchange and government securities.
| Economic Situation | RBI Action | Effect |
|---|---|---|
| Excess Demand / Inflation | ↑ Raise Bank Rate | Credit contracts → Prices stabilise |
| Deficient Demand / Deflation | ↓ Lower Bank Rate | Credit expands → Economy revives |
- Bank rate is now primarily signalling rate— it signals RBI's long-term outlook on interest rates
- Since the RBI stopped discounting bills of exchange, the bank rate is not an active instrument in India
- It now acts as a penal interest rate— charged by banks when they fall short of CRR/SLR requirements
- In practice, the repo rate has replaced the bank rate as the main monetary tool
Real-Life Analogy: Think of RBI as a wholesale supplier and commercial banks as retailers. The bank rate is the "wholesale price" that banks pay the RBI. If wholesale costs rise, retailers (banks) raise their selling prices (interest rates) to customers, making loans more expensive and reducing borrowing.
Repo Rate & Reverse Repo Rate
Since the bank rate is no longer actively used, the repo rate is the RBI's primary monetary policy tool today. It replaced the bank rate for managing liquidity and interest rates.
Pawn Shop Analogy: Imagine pledging your gold at a pawn shop to get cash, with an agreement to buy it back later. Banks do exactly this — they pledge government bonds with the RBI to get short-term cash. The interest charged on that cash = Repo Rate.
Fixed Deposit Analogy: When banks have excess cash, they "deposit" it with RBI and earn interest, just like you put money in a bank FD. The interest RBI pays = Reverse Repo Rate. Higher reverse repo → banks prefer to park money with RBI → less lending → less inflation.
| Feature | Repo Rate | Reverse Repo Rate |
|---|---|---|
| Who borrows? | Banks borrow from the RBI | RBI borrows from banks |
| Collateral | Banks pledge to the government. bonds to RBI | RBI sells the government. bonds to banks |
| Purpose | Injects liquidity into the system | Absorbs excess liquidity |
| If Raised | Loans costlier → Credit shrinks | Banks park more with RBI → Less lending |
| Rate Level | Always HIGHER | Always LOWER than Repo |
| June 2022 | 4.90% | 3.35% |
| Date | Repo Rate | Reverse Repo Rate |
|---|---|---|
| March 31, 2004 | 6.0% | 5.0% |
| July 30, 2008 | 9.0% | 8.0% |
| March 21, 2009 | 4.75% | 3.75% |
| October 21, 2011 | 8.5% | 7.5% |
| January 15, 2015 | 7.75% | 6.75% |
| August 1, 2018 | 6.5% | 6.25% |
| May 22, 2020 (COVID low) | 4.0% | 3.35% |
| June 8, 2022 | 4.9% | 3.35% |
Monetary Policy Committee
| RBI Members | Government Members |
| RBI Governor (Chairperson) | External Expert (Economics) |
| Deputy Governor (Monetary Policy) | External Expert (Banking/Finance) |
| One RBI Board Nominee | External Expert (Monetary Policy) |
- Before 2016: Only the RBI Governor & internal team controlled monetary policy decisions
- After 2016 (MPC): Decisions taken by a 6-member committee — binding on RBI
- Bring diversity of views and independence of opinion
- Decisions by majority vote; the Governor has a casting vote in case of a tie
- Meets at least 4 times a year to review macroeconomic conditions
Open Market Operations
Sponge Analogy: Think of RBI as a sponge for money. When there's too much money (inflation), the RBI sells securities — soaking up excess money from banks. When there's too little money (recession), the RBI buys securities — squeezing money back into banks.
| Situation | RBI Action | Effect on Banks | Outcome |
|---|---|---|---|
| Inflation / Boom | Sells securities | Cash reserves fall | Credit ↓, Prices stabilise |
| Recession / Deflation | Buys securities | Cash reserves rise | Credit ↑, the economy grows |
Effects of Open Market Operations
- Effect on Reserves of Commercial Banks
OMO directly changes the cash reserves of commercial banks, which determines their power to create credit. A change in reserves leads to a multiplied change in total money supply. - Effect on Interest Rate
Buying/selling securities changes their market price. Since price and yield are inversely related, this affects market interest rates throughout the economy. - Effect on Future Expectations
OMO signals RBI's policy stance to the market. Aggressive buying signals an easing policy; aggressive selling signals tightening. This changes the expectations of banks, businesses, and investors — affecting their decisions immediately, even before the actual money supply changes. - Simultaneous Determination of Interest Rate & Money Supply
The central bank cannot simultaneously fix both the security price (interest rate) and the reserves of commercial banks (money supply) through OMO.
If the RBI fixes the quantity of securities traded, interest rates fluctuate freely.
If RBI fixes the price (yield) → money supply/reserves fluctuate freely. - Effect on Balance of Payments
Selling securities → contracts credit → deflation → domestic prices fall → exports become cheaper for foreigners (export demand rises) → imports decline (foreign goods relatively costlier) → BoP improves.
Cash Ratio Reserve
CRR is the minimum percentage of total deposits that commercial banks must maintain as cash reserves with the RBI. It is a statutory requirement — banks earn no interest on CRR deposits.
Locked Piggy Bank Analogy: Imagine you receive ₹100. Your parents (RBI) say: "You must always keep ₹4.50 locked with us." You can only use the remaining ₹95.50. If they raise the requirement to ₹5, you have even less to use. Higher CRR = less money banks can lend.
CRR in India — Timeline
Aug 2008: 9.0% — peak level, tight monetary policy
Feb 2013: 4.0% — reduced to support growth
Mar 27, 2020: 3.0% — emergency COVID cut to inject liquidity
Jul 2021: 4.0% — restored post-COVID
May 2022: 4.5% — raised to counter rising inflation
Variable Cash Reserve Ratio
Variable CRR allows the central bank to change the cash reserve ratio as needed, making it a flexible tool. It was first used by the Federal Reserve System of the USA in 1935.
- First used: USA (Federal Reserve System), 1935
- India's first use: March 1960 — commercial banks asked to maintain an additional deposit equal to 20% of the increase in their total liabilities with RBI
- Legal basis: Banking Companies Act, 1949 (amended 1962) — gave RBI power to raise cash reserves to 3% of total liabilities
- Allows RBI to respond quickly to changing economic conditions by varying the ratio frequently
Limitations of Variable CRR
- Excessive Reserves: Ineffective when banks already hold very large excess cash reserves — they can still lend despite a higher CRR.
- Large Foreign Funds: Not effective when banks hold large foreign currency funds, as these can compensate for reduced domestic reserves.
- Only for Big Changes: Suitable only for large adjustments in reserves. Not ideal for small or marginal changes in credit.
- Business Sentiment: Effectiveness depends on the general mood of the business community — if confidence is low, even lower CRR may not boost investment.
- Discriminatory: Favours bigger commercial banks, which are better able to absorb CRR changes than smaller banks.
- Uncertainty: Frequent changes in CRR create unpredictability in banking operations, making it difficult for banks to plan their lending.
Statutory Liquidity Ratio
SLR is the minimum percentage of total deposits that commercial banks must maintain with themselves in the form of cash, gold, or approved government securities. This is in addition to CRR.
Emergency Fund Analogy: Like keeping an emergency fund in your own locker (not giving it to anyone), banks must keep SLR funds in their own vault as cash, gold, or safe investments. It ensures banks always have enough money to meet customer withdrawal demands.
| Period | SLR Rate |
|---|---|
| April 2008 – February 2012 | 24% |
| August 2012 | 23% |
| June 2014 | 22.5% |
| August 2017 | 19.5% |
| June 8, 2022 | 18% |
Key Points: Quantitative Methods
Quantitative methods control the overall volume of credit in the economy without discrimination.
Bank Rate / Repo Rate:
- ↑ Rate → borrowing becomes costly → credit contracts (controls inflation)
- ↓ Rate → borrowing becomes cheaper → credit expands (controls deflation)
Open Market Operations:
- Sale of securities → reduces bank reserves → less credit
- Purchase of securities → increases bank reserves → more credit
CRR & SLR:
- ↑ CRR/SLR → banks lend less
- ↓ CRR/SLR → banks lend more
