Why labour costs matter so much

For most businesses, wages are one of the single biggest costs they face — think about it, a coffee shop probably spends more on staff wages over a year than on the coffee beans themselves. This means lowering labour costs (without hurting output) is one of the fastest ways for a firm to boost profit. There are really only two ways to do this:

• Increase productivity — get more output per worker (e.g. through training or better equipment), so you need fewer workers for the same output.
• Reduce wages/salaries — pay workers less for the same work (though this risks losing good staff or hurting morale).

Quality vs Quantity of labour — don't mix these up

This distinction comes up constantly in exam questions, so let's nail it with a clear mental picture:

Real-world example: Google, Facebook and Microsoft set up near Paris universities (École Polytechnique, Sorbonne, Sciences Po) to tap into high-quality labour — highly skilled graduates. Meanwhile, multinationals building factories in Bangladesh or Vietnam are chasing high-quantity labour — huge workforces willing to work for low wages. Same goal (lower labour costs per unit of output), completely different strategy.

Education vs Training — who pays, and why it matters

These two words get used almost interchangeably in everyday speech, but in economics they're distinct:

Here's the interesting economic trade-off: in countries like Sweden and Denmark where university education is free, firms benefit because they don't have to pay as much to train specialist workers — the government has already done a lot of that work for them. Ireland's heavy investment in science education is a great example: it attracted pharmaceutical giants like Pfizer and Abbott Laboratories, because the labour force already had the specialist skills these firms needed.

On the flip side, in countries that invest less in public education, the burden shifts onto businesses — they have to spend more of their own money training workers. This raises costs, but the upside is the training is highly tailored to specific skills the firm actually needs (like Tesla's employee training programmes).

Labour demand is a "derived demand" — the most important idea in this chapter

This is genuinely the concept the whole chapter hangs off, so let's really get it. A "derived demand" means the demand for one thing exists only because of the demand for something else. Nobody demands labour for the sake of having workers standing around — firms demand labour because people demand the goods and services those workers help make.

Example from the text: As demand for technology devices increases, tech firms require more skilled labour to design, manufacture and market those products.

The Demand Curve for Labour (D_L)

There's an inverse relationship between the wage rate and the quantity of labour demanded — as wages rise, firms want to employ fewer workers (labour becomes more expensive relative to alternatives like machinery).

This makes intuitive sense: if the wage rate goes up, hiring an extra worker costs the firm more, so firms hire fewer people (or invest in machinery instead).

Movement along vs. Shift of the curve — a classic exam trap

This distinction trips up almost every student at some point, so let's be crystal clear:

• Movement along the curve: happens ONLY when the wage rate itself changes. Nothing else.
• Shift of the entire curve: happens when any OTHER factor changes (price of product, demand for the product, ability to substitute capital, productivity).

Worked Example — Increase in Demand for Labour

The rise of online shopping increased demand for delivery drivers and warehouse workers. Because demand for labour is derived from demand for the final product (fast, convenient delivery), the whole demand curve shifted right: D_L → D₁. At the same wage W1, the quantity of labour employed rose from Q to Q₁.

Worked Example — Decrease in Demand for Labour

Clothing manufacturers in Bangladesh and Vietnam have invested in automated production to cut labour costs. This is the "substitution of capital for labour" factor in action — the curve shifts left from D → D₂, and at the same wage W1, quantity employed falls from Q to Q2.

The Supply Curve for Labour (S_L)

This shows the relationship between the wage rate and the number of workers willing to work in an occupation. Unlike demand, this curve slopes upward — a positive relationship. As wages rise, more people are attracted into that job (maybe switching from a lower-paid job, or being tempted off the sofa altogether).

What shifts the entire supply curve?

Same logic as before: the supply curve shows the market supply of labour, not any one individual's choice. A whole range of factors can shift it left or right:

Geographical vs. Occupational mobility — another pair worth separating clearly

Worked Example — Increase in Supply

India's growing population increases the number of people available to work. This shifts the supply curve right from S → S1. At the same wage rate W1, the quantity of labour supplied rises from Q to Q1.

Worked Example — Decrease in Supply

The UK raised its school-leaving age from 16 to 18. Fewer 16-18 year olds are legally able to enter full-time work, so the supply curve shifts left from S → S2. At the same wage W1, the quantity supplied falls from Q to Q2.

Putting demand and supply together: equilibrium

Just like any other market, the labour market reaches equilibrium where D_L = S_L. At this point there's no excess supply (unemployed people desperate for that job at that wage) and no excess demand (firms desperately short of workers at that wage).

Individual firms are usually "price takers" in the labour market — they have to accept the going wage rate for that occupation. Offer less, and you'll struggle to recruit. Offer more, and you'll get flooded with applicants (an excess supply), which is inefficient — you're overpaying compared to what the market requires.

What happens when demand for labour rises?

A rise in demand for the final product (e.g. more demand for websites → more demand for graphic designers, since demand for labour is derived) shifts D_L rightward, from D_L1 to D_L2.

What happens when supply of labour falls?

If graphic designers switch to different jobs, the supply curve of labour shifts left (S → S1).

What is a trade union?

A trade union is an organisation that represents the interests of its workers in negotiations with a firm's management or owners. Their core concerns are wages/benefits, health & safety, and reducing discrimination or exploitation.

Types of trade union — a common multiple-choice topic

Memory trick: General = "any job, any skill." Industrial = "same industry, any skill." Craft = "specific skilled trade." White collar = "office professionals."

How trade unions actually work

Workers pay a monthly fee called a subscription to remain a member. In return, they get benefits like collective bargaining power, job-specific training, legal representation in disputes, and discounts on goods/services.

When negotiations (collective bargaining) with employers break down, unions can escalate to industrial action to pressure employers:

• Strikes — workers stop working entirely
• Overtime bans — workers refuse to work beyond contracted hours
• Work to rule — workers do the absolute minimum required by their contract, nothing more
• Go-slows — workers deliberately work at a slower pace

The three main focuses of trade union effort

1. Collective bargaining on wages, working conditions and contractual terms — e.g. negotiating pay above minimum wage, inflation-linked pay rises, higher wages when firm profits rise, and better working hours/conditions.
2. Protecting employment — e.g. negotiating retention/redeployment when machinery replaces labour, or fair redundancy/resettlement terms when firms relocate or downsize.
3. Influencing government policy — e.g. lobbying for minimum wage levels, or using strikes to pressure policy change.

How unions change the equilibrium

Through collective bargaining, unions give workers collective power to push wages above what an individual worker could negotiate alone, and through negotiation they can also influence the rate of employment (e.g. protecting jobs during automation or downturns).

• I can explain why labour costs matter to firms and how they can be reduced
• I can distinguish between quality and quantity of labour with real examples
• I can explain the difference between education and training and who funds each
• I can explain what "derived demand" means and apply it to a new example
• I can draw and label the demand curve for labour and explain its downward slope
• I can list and explain all four factors that shift the demand curve for labour
• I can draw and label the supply curve for labour and explain its upward slope
• I can list and explain the factors that shift the supply curve for labour
• I can distinguish geographical mobility from occupational mobility
• I understand why firms are "price takers" in the labour market
• I can predict the effect on wage AND quantity when demand shifts vs. when supply shifts
• I can name and describe the four types of trade union with examples
• I can list the forms of industrial action and explain what collective bargaining achieves
• I can assess the impact of trade unions on both workers and employers (two-sided)