Theories of Labour Market Discrimination and Exploitation

Ever look at a job report or a discussion about pay and wonder, “Why are we still talking about a gender pay gap?” It’s a question that often gets a simple, but incomplete, answer: “Well, men and women just *choose* different jobs or different career paths.” But what if that choice isn’t as free as it looks? What if the “paths” themselves are designed differently, with invisible barriers, toll booths, and detours? Economists have been grappling with this for centuries, and they’ve developed some powerful theories that dig much deeper. These theories move past simple explanations and explore the complex, often hidden structures of discrimination and exploitation in the labour market.

Is it all just about education and skills? 🔗

The most common starting point for any discussion on wages is human capital. This is the big idea, most famously associated with economists like Gary Becker, that our skills, knowledge, and experience are a form of capital, like a factory or a machine. We “invest” in our human capital by going to college, taking training courses, or even just gaining years of experience on the job. The theory says that the more you invest, the more productive you become, and the higher your paycheck will be. It’s a clean, logical model, and it explains a lot. It explains why, on average, a doctor earns more than a cashier.

The human capital story 🔗

On the surface, this model seems to offer a straightforward solution to inequality: just invest in more human capital. For decades, this has been the rallying cry. And to a large extent, women have answered that call. Around the world, women’s educational attainment has risen dramatically, in many countries even surpassing that of men. You would expect that as women’s human capital levels caught up to men’s, the pay gap would simply vanish.

But it hasn’t. This is where the simple story breaks down and a more complex one begins.

The catch: when the same investment pays less 🔗

The true problem isn’t just about the *level* of investment; it’s about the *payoff*. This is the critical point highlighted in economic models, such as those by Deshpande. Discrimination exists when, for the exact same level of human capital investment, one group (the majority, historically men) gets a bigger reward than another (the minority, women). Imagine two people planting identical seeds (their education and skills) in two different plots of land. One person’s plot has been systematically fertilized and irrigated for generations, while the other’s is rocky and dry. Even with the same seed, the harvests will be wildly different.

This is what happens in the labour market. A man with a business degree and a woman with the same business degree from the same university may step into the workforce and immediately face different “demand curves” for their investment. The incentive to invest in skills is directly tied to the expected lifetime payoff. If society expects women to take career breaks for caregiving, the “payoff” for their human capital investment is seen as lower, both by them and by employers. This creates a disparity before the first day of work even begins.

The problem of ‘invisible fences’ 🔗

If human capital isn’t the whole story, what else is at play? Classical economists like Adam Smith, and later John Elliot Cairnes and Frank Taussig, offered a clue. They called it the theory of non-competing groups. The idea is that the labour market isn’t one big, open field where everyone competes for every job. Instead, it’s a series of separate, fenced-off arenas. Think of it like a castle with its surrounding territories. You have the high-status, well-paid jobs inside the castle walls (like doctors, lawyers, engineers), and then you have the lower-paid, more accessible jobs in the fields and villages outside (like teaching, nursing, clerical work).

How ‘custom’ builds the walls 🔗

What builds these walls? According to the philosopher and economist John Stuart Mill, the primary materials are custom and prejudice. Writing in the 19th century, Mill argued that the pay gap was not a matter of logic or efficiency, but of power. He explained that long-standing custom had made women an “appendage of man,” a social arrangement that allowed men to take the “lion’s share” of resources. This social custom doesn’t just stay at home; it walks right into the office. It creates assumptions about what is “men’s work” and “women’s work.” The high-status, high-paid “castle” jobs became inaccessible to women, not because they weren’t capable, but because custom dictated they belonged elsewhere. They were relegated to the “pleasant” or “caring” jobs, which, by no coincidence, were also the ones with lower pay and less power.

What happens when everyone is pushed into one place? 🔗

This “fencing off” of professions has a predictable and devastating economic consequence. This is the core of the job crowding hypothesis, a theory pioneered by economists Millicent Fawcett and Francis Edgeworth. It’s a brilliant and simple explanation for *why* “women’s work” pays less.

A simple story of supply and demand 🔗

It’s basic economics: when supply is high and demand is low, the price drops. Now, apply this to jobs. Imagine the entire job market has 100 professions. If prejudice and custom (the “invisible fences”) block women from fairly competing for 50 of those professions-the “male” jobs-what happens? All the women who want to work are “crowded” into the remaining 50 professions. This creates a massive oversupply of labour in those “female” jobs. With so many people competing for a limited number of positions, employers have no incentive to raise wages. In fact, wages get pushed *down*.

At the same time, in the “male” professions, the supply of labour is *artificially restricted*. With less competition, the men in those jobs can command higher wages. The job crowding hypothesis shows that the wage gap is a direct result of occupational segregation. It’s not that nursing is “worth” less than engineering; it’s that one profession has been historically open to all, while the other has been protected from competition by social barriers.

Crowding in the modern context 🔗

This isn’t just history. We see echoes of this crowding in modern economies, including in India. While women have entered many professions, barriers remain. Reports from government bodies like NITI Aayog have highlighted how job growth can be uneven and that gender gaps persist. For example, rural women are often “largely excluded from the services sector” and remain crowded into agriculture, which is dominated by informal and low-paid work. This modern-day example shows how the theory of non-competing groups and job crowding are still very much alive, creating different economic realities for different groups.

Is discrimination just… a personal preference? 🔗

Finally, we come to one of the most famous and controversial theories: Gary Becker’s taste model of discrimination. Becker, who won a Nobel Prize for his work, proposed a chillingly simple idea: some employers are prejudiced, and that prejudice acts like an economic “taste.” It’s not rational, but it is real. Just as someone might have a “taste” for brand-name clothes and be willing to pay more for them, a prejudiced employer has a “taste for discrimination” and is willing to *pay* to indulge it.

The discrimination coefficient 🔗

Becker’s model introduces a concept called the discrimination coefficient (d). This is the monetary “cost” of an employer’s prejudice. Let’s say a man and a woman are both equally productive and their work is worth ₹500 a day. A non-prejudiced employer would be indifferent, hiring whichever one is available. But a prejudiced employer, who has a “taste” for discriminating against women, experiences a *psychic cost*-a “disutility”-from hiring the woman. Let’s say his “d” value is ₹100.

In his mind, the “real” cost of hiring the woman isn’t just her ₹500 wage; it’s `Wage + d`, or `₹500 + ₹100 = ₹600`. Because he perceives the man’s cost at just ₹500, he will always hire the man. The only way he will hire the woman is if she is willing to “compensate” him for his prejudice by accepting a lower wage. In this case, she would have to accept a wage of ₹400, so that `₹400 (wage) + ₹100 (d)` equals the man’s ₹500 wage. This is how personal prejudice gets translated directly into a wage gap.

Why would this last in a competitive market? 🔗

The obvious criticism of Becker’s model is that these prejudiced firms should be less profitable. They are either hiring less-productive men or paying more for the same work. In a perfectly competitive market, they should go out of business. However, discrimination can persist if the “taste” is widespread among employers, or if customers or co-workers also share that prejudice. If customers are willing to pay more for a service from a man, or if male co-workers demand higher pay to work alongside women, the discrimination gets locked into the market. It shows that prejudice isn’t just a “social” problem; it’s a real and measurable economic force that can and does create and sustain inequality.

What do you think?

When you look at the world of work around you, which of these theories-unequal payoffs on education, the “invisible fences” of non-competing groups, the crowding of certain professions, or a “taste” for discrimination-feels most relevant?

If, as John Stuart Mill suggested, “custom and prejudice” are such powerful economic barriers, what is one practical way we can start to change those customs in our communities or workplaces?

References

1. https://docs.iza.org/dp1102.pdf
2. https://www.studysmarter.co.uk/explanations/microeconomics/labour-market/discrimination-in-the-labour-market/
3. https://www.thehindu.com/news/national/niti-aayog-flags-uneven-job-growth-in-services-sector/article70213558.ece
4. https://en.wikipedia.org/wiki/Taste-based_discrimination