flowchart LR D[Demand for Labour<br/>Derived from product demand] --> E[Equilibrium<br/>Wage × Employment] S[Supply of Labour<br/>LFPR × Population] --> E E -. Determines .-> W[Wages] E -. Determines .-> EM[Employment] style D fill:#FFF3E0,stroke:#E65100 style S fill:#E3F2FD,stroke:#1565C0 style E fill:#E8F5E9,stroke:#2E7D32 style W fill:#F3E5F5,stroke:#6A1B9A style EM fill:#FCE4EC,stroke:#AD1457
60 Demand and Supply of Labour
This chapter takes up the demand for and supply of labour — the two sides of the labour market that together determine employment and wages.
60.1 Demand for Labour
The demand for labour is derived demand — labour is demanded not for itself but for the goods and services it produces. It depends on the demand for the firm’s output.
60.1.1 Determinants of Labour Demand
TipSix Determinants of Labour Demand
| Determinant | Effect on demand |
|---|---|
| Demand for the product | Higher product demand → higher labour demand |
| Productivity of labour | Higher productivity → labour-saving demand may fall |
| Price of labour (wage) | Higher wage → lower demand (downward-sloping curve) |
| Price of substitutes | Cheaper machines → labour replaced |
| Price of complements | Cheaper raw materials → expanded production → more labour |
| Technology | Labour-augmenting raises demand; labour-saving reduces it |
60.1.2 The Marginal Productivity Theory of Labour Demand
A firm hires labour up to the point where the marginal revenue product of labour (MRPL) equals the wage rate.
Wage = MRPL = Marginal Physical Product × Price of Output
The labour demand curve is downward-sloping because of the law of diminishing marginal returns — each additional worker adds progressively less to output.
60.1.3 Elasticity of Labour Demand
Labour demand can be elastic or inelastic depending on:
- Substitutability with capital (more substitutable → more elastic);
- Elasticity of demand for the final product (more elastic product demand → more elastic labour demand);
- Share of labour cost in total cost (higher share → more elastic);
- Time horizon (longer run → more elastic).
These are the Marshall-Hicks rules of derived demand.
60.2 Supply of Labour
Labour supply has two senses:
TipTwo Senses of Labour Supply
| Sense | What it means |
|---|---|
| Aggregate supply | Total number of workers willing to work in the economy |
| Individual supply | Number of hours an individual worker is willing to work |
60.2.1 Determinants of Labour Supply
TipSix Determinants of Labour Supply
| Determinant | Effect |
|---|---|
| Wage rate | Higher wage → typically higher supply (positive slope) |
| Population size and structure | More working-age people → more supply |
| Labour force participation | Female LFPR, retirement age, student-worker ratio |
| Migration | Net inflow / outflow shifts supply |
| Education | Time in education reduces immediate supply but raises productivity |
| Cultural / social norms | Restrictions on women’s work, caste constraints |
60.2.2 Backward-Bending Supply Curve
The individual labour supply curve is sometimes backward-bending — at high wages, the income effect (worker can afford more leisure) overtakes the substitution effect (higher wage makes work more attractive), so labour supply falls.
TipIncome vs Substitution Effect
| Effect | Direction |
|---|---|
| Substitution effect | Higher wage → leisure costlier → more work supplied |
| Income effect | Higher wage → can afford more leisure → less work supplied |
| Backward-bending curve | At high enough wages, income effect dominates |
60.2.3 Labour Force Participation Rate (LFPR)
LFPR is the central measure of aggregate labour supply.
LFPR = (Labour Force / Working-age Population) × 100
Indian PLFS 2023-24 reports overall LFPR around 57%, male around 78%, female around 42%.
60.3 Labour Market Equilibrium
The intersection of demand and supply determines the equilibrium wage and equilibrium employment.
60.3.1 Disequilibrium in the Labour Market
When wages are not at equilibrium, the labour market shows:
- Excess supply (unemployment) — when wage > equilibrium;
- Excess demand (vacancies, labour scarcity) — when wage < equilibrium;
- Sticky wages — wages adjust slowly, prolonging disequilibrium.
60.4 Imperfections in the Labour Market
Real labour markets diverge from the textbook competitive model in five ways:
TipFive Imperfections of Real Labour Markets
| Imperfection | Effect |
|---|---|
| Monopsony | One employer (or few) — wages depressed below MRPL |
| Monopoly union | Union sets wages above competitive level |
| Information asymmetry | Workers and employers have incomplete knowledge |
| Search frictions | Time and cost of finding a job / worker |
| Discrimination | Group-based barriers to entry and pay |
60.5 Wage Determination — Combined Demand and Supply
Wage determination in the real world combines:
- Marginal productivity (demand side);
- Subsistence and bargaining (supply side);
- Institutions — minimum wages, collective bargaining, pay commissions, social norms.
The eclectic model is the standard practitioner’s view.
60.6 Indian Labour Market — Demand and Supply Patterns
TipIndian Labour Market Patterns
| Pattern | Mechanism |
|---|---|
| Demographic dividend | Large working-age population — supply rising |
| Female LFPR rising | More women entering market — supply rising |
| Skills mismatch | Demand for skilled, supply of unskilled |
| Premature deindustrialisation | Industry not absorbing displaced agricultural labour |
| Wage stagnation in informal sector | Excess supply suppressing wages |
| IT and services boom | Sector-specific tight labour markets, wage premia |
| Migration | Internal mobility easing some local imbalances |
60.7 Practice Questions
Eight questions to test the chapter. Each card hides the answer — click Show answer to reveal it.
Q1
Demand for labour is derived because
Demand for labour is derived because:
AIt is fixed by law
BIt depends on demand for the firm's output
CIt is determined by the worker
DIt is constant
Show answer
Correct answer
B. It depends on demand for the firm's output
Q2
A firm hires labour up to
A firm hires labour up to the point where:
AWage = average product
BWage = MRPL (Marginal Revenue Product of Labour)
CWage = total product
DWage = output price
Show answer
Correct answer
B. Wage = MRPL (Marginal Revenue Product of Labour)
Q3
Marshall-Hicks rules determine
Marshall-Hicks rules determine:
AEquilibrium wage
BElasticity of derived demand
CPension rates
DBonus
Show answer
Correct answer
B. Elasticity of derived demand
Q4
The backward-bending labour supply curve arises
The backward-bending labour supply curve arises because at high wages:
ASubstitution effect dominates
BIncome effect dominates
CBoth effects cancel
DWages fall
Show answer
Correct answer
B. Income effect dominates
Q5
Indian male LFPR (2023-24, PLFS) is
Indian male LFPR (2023-24, PLFS) is approximately:
A50%
B65%
C78%
D90%
Show answer
Correct answer
C. 78%
Q6
Monopsony in labour markets refers to
Monopsony in labour markets refers to:
AOne worker
BOne (or few) buyers of labour
COne trade union
DOne occupation
Show answer
Correct answer
B. One (or few) buyers of labour
Q7
Sticky wages explain why
Sticky wages explain why:
AWages always adjust quickly
BWages adjust slowly, prolonging disequilibrium (unemployment or vacancies)
CWages are set by law
DWages are stored
Show answer
Correct answer
B. Wages adjust slowly, prolonging disequilibrium (unemployment or vacancies)
Q8
Demographic dividend refers to
Demographic dividend refers to:
AOld-age pension
BA large working-age population relative to dependants — increasing supply
CFamily allowance
DMaternity pay
Show answer
Correct answer
B. A large working-age population relative to dependants — increasing supply
ImportantQuick recall
- Labour demand = derived demand; depends on product demand.
- Marginal productivity theory: hire until wage = MRPL.
- Marshall-Hicks rules of derived demand: substitutability, product-demand elasticity, labour cost share, time horizon.
- Labour supply driven by wage, population, LFPR, migration, education, social norms.
- Backward-bending supply curve — income effect overtakes substitution at high wages.
- LFPR India (2023-24): overall ~57%; male ~78%; female ~42%.
- Imperfections: monopsony, monopoly union, information asymmetry, search frictions, discrimination.
- Wage determination = MRPL + bargaining + institutions.
- Indian patterns: demographic dividend, rising female LFPR, skills mismatch, premature deindustrialisation, IT/services boom.