Workers
Demand for Labour (D_L):
Labour is a derived demand. Firms do not hire workers for their own sake but to produce goods/services that generate revenue. Therefore, demand depends on the Marginal Revenue Product (MRP) of labour.
- MRP = Marginal Product (MP) \times Marginal Revenue (MR)
- The firm hires up to the point where Wage (W) = MRP.
- If MRP > Wage, the worker adds more to revenue than cost, so profit increases by hiring them.
Supply of Labour (S_L):
Individuals supply labour based on the trade-off between income and leisure. As wages rise, the opportunity cost of leisure increases, encouraging more work (substitution effect), though at very high wages, the income effect may dominate.
Equilibrium:
The market wage (W_E) and quantity of labour (Q_E) are established where D_L = S_L.
Shifts in Demand (D_L):
Demand shifts if:
- Productivity changes: Better technology or training increases MP, shifting D_L right.
- Demand for the product changes: If consumers want more of the final good, firms need more workers to produce it.
- Price of other factors: If capital (machinery) becomes cheaper, firms may substitute labour for capital, reducing D_L.
Shifts in Supply (S_L):
Supply shifts if:
- Population changes: More people entering the workforce shifts S_L right.
- Migration: Influx of workers from other regions/countries.
- Non-wage factors: Changes in job attractiveness (e.g., working conditions, status).
Formula: MRP = MP \times MR
Where:
- MP = Marginal Product (additional output from one extra worker)
- MR = Marginal Revenue (additional revenue from selling one extra unit of output)
Firms hire workers up to the point where Wage = MRP. If Wage < MRP, hiring more workers increases profit.
Synthesis: Why Wages Differ
Wage differences across workers are not random; they result from specific economic forces. Understanding these is critical for answering synthesis questions.
Demand and Supply Imbalances (LO 8):
- High Demand/Low Supply: Skilled professions (e.g., surgeons, engineers) have high MRP due to productivity and limited supply of qualified workers. This drives wages up.
- Low Demand/High Supply: Unskilled jobs often have low MRP and many available workers, keeping wages low.
Relative Bargaining Strength (LO 3):
- Trade Unions: If unions are strong, they can negotiate wages above the market equilibrium (W > W_E). This creates a surplus of labour (unemployment) but raises pay for members.
- Monopsony Power: If there is only one major employer in an area, they can suppress wages below competitive levels because workers have few alternatives.
Discrimination (LO 10):
- Discrimination occurs when wages are set lower than the MRP for specific groups (e.g., female vs. male workers) due to employer bias or prejudice.
- This creates an artificial surplus of labour in the discriminated group's sector, depressing wages below what they would be in a fair market.
Government Policy (LO 4):
- National Minimum Wage (NMW): Sets a price floor. If set above equilibrium (W_{min} > W_E), it raises wages for low-skilled workers but may cause unemployment if S_L > D_L at that wage.
Sector Differences (LO 9, 11):
- Primary Sector: Often lower wages due to lower productivity and high supply of labour in developing economies.
- Secondary/Tertiary Sector: Higher wages due to higher MRP and capital intensity.
- Public vs. Private: Public sector wages may be lower than private sector equivalents but often include better non-wage benefits (job security, pensions).
Scenario: Government imposes an NMW (W_{min}) above the equilibrium wage (W_E).
Diagram Description:
- Draw standard supply and demand axes: Wage (W) on Y-axis, Quantity of Labour (Q_L) on X-axis.
- Draw downward-sloping Demand curve (D_L) and upward-sloping Supply curve (S_L).
- Mark equilibrium E where D_L = S_L, with wage W_E and quantity Q_E.
- Draw a horizontal line at W_{min} above W_E.
- At W_{min}, the quantity of labour demanded is Q_D (on the demand curve) and quantity supplied is Q_S (on the supply curve).
- Since Q_S > Q_D, there is a surplus of labour (unemployment) equal to Q_S - Q_D.
Interpretation:
- Workers who keep their jobs earn higher wages (W_{min}).
- Some workers lose jobs because firms hire fewer people at the higher cost.
- The size of unemployment depends on the elasticity of demand and supply. If demand is elastic, unemployment increases significantly.
Correction:
- Unemployed: People who are actively seeking work but cannot find it. They are part of the labour force.
- Economically Inactive: People who are not seeking work (e.g., retirees, full-time students, carers). They are NOT part of the labour force.
Why this matters:
In labour market diagrams, shifts in the supply of labour only occur if people enter or leave the labour force. Retirees leaving the workforce is a shift in supply (left), but they are not 'unemployed'.
Correct Phrasing:
'Discrimination suppresses wages below the Marginal Revenue Product (MRP) for the discriminated group. Employers may hold biased views, leading to an artificial surplus of labour in that sector, which drives wages down.'
Why examiners accept this:
This directly addresses the definition of discrimination as a market failure where wages are not determined purely by productivity (MRP). It shows you understand that the wage gap is 'artificial' and not due to skill differences.
Example Usage:
'Female workers may earn less than male workers in the same role because employers discriminate, creating an excess supply of female labour which depresses wages below their MRP.'
Occupational Mobility:
The ability of workers to move between different jobs/occupations.
- Causes: Education, training, transferable skills, lack of professional licensing barriers.
- Consequences: Higher mobility reduces structural unemployment. Workers can move from declining industries to growing ones. It increases wage equality across sectors.
Geographical Mobility:
The ability of workers to move between different locations (regions/countries).
- Causes: Cheap transport, housing availability, language skills, government relocation grants.
- Consequences: Helps resolve regional unemployment. If one region has high unemployment and another has labour shortages, mobility allows workers to fill vacancies, balancing wages nationally.
Definition: The separation of the production process into distinct tasks, with each worker specialising in one specific task rather than producing a whole product.
Advantages:
- Increased Productivity: Workers become faster and more skilled at their specific task (learning by doing).
- Time Saving: No time lost switching between different tools or tasks.
- Specialisation: Allows workers to focus on tasks that match their comparative advantage.
Disadvantages:
- Monotony/Boredom: Repetitive work can lower morale and increase absenteeism.
- Interdependence: If one stage of production fails, the whole process stops.
- Skill Loss: Workers may lose general skills, making them less adaptable to other jobs (occupational immobility).
- Higher Total Income: Long hours or hazardous conditions often command higher wage rates (compensating differential). This increases total pay, allowing the worker to support their family or save more.
- Career Progression/Skill Acquisition: Working extra hours may allow the worker to gain experience or impress management, leading to promotions or better future opportunities.
- High Demand for Labour: If the product demand is inelastic, firms can pass higher wage costs to consumers, making them more willing to pay union demands.
- Low Elasticity of Supply of Labour: If it is hard to replace workers (e.g., skilled engineers), unions have more power because strikes cause significant disruption.
- High Membership Density: If most workers in the industry are members, the union can threaten a total shutdown.
- Non-Wage Benefits: Public sector jobs often offer superior fringe benefits (e.g., generous pensions, job security, healthcare) that outweigh higher private sector wages.
- Work-Life Balance: The reduced hours provide more leisure time, which some workers value more than additional income.
- Wage Gap: If the private sector wage is not significantly higher to compensate for the loss of public sector benefits, the net utility may be lower.
Correct Approach:
- Clearly label axes: Wage Rate (W) and Quantity of Labour (Q_L).
- Draw D_L (downward) and S_L (upward).
- Mark equilibrium E with W_E and Q_E.
- Draw the NMW line above W_E.
- Label the surplus of labour clearly as 'Unemployment' or 'Surplus of Labour' (Q_S - Q_D).
Why examiners accept this:
Examiners look for the specific identification of the surplus. Simply drawing a higher wage line is insufficient; you must show the resulting gap between quantity supplied and demanded to demonstrate understanding of the market disequilibrium.
- Level of education and training (transferable skills).
- Government retraining programs.
- Recognition of qualifications across industries.
Geographical Mobility is influenced by:
- Cost and availability of transport/housing.
- Family ties and emotional attachment to home.
- Language barriers (for international migration).
Both are increased by government policy (e.g., education spending for occupational; relocation grants for geographical).