Imagine you own a small coffee shop. You already have four employees working every day, and business is good — but you’re wondering whether to hire one more. The question isn’t whether the new worker can make more coffee. It’s: how much extra money will this worker help the business earn?

That extra revenue is called Marginal Revenue Product (MRP) — the additional revenue earned by employing one more unit of a resource, such as one extra worker. Businesses use MRP every time they decide whether hiring another employee is worth it.

Why MRP matters

Every business has limited money, and hiring more workers means paying more wages. So firms compare two things: how much extra revenue a worker creates, and how much that worker costs. If the worker brings in more than their wage, hiring makes sense. If not, the business loses money on that hire. MRP is what makes that comparison possible.

A real-life example: Sarah’s bakery

Sarah owns a bakery with two bakers, who together bake 100 cakes a day. She hires a third baker, and daily output rises to 130 cakes — 30 extra cakes from that one hire. Each cake sells for $20, so the extra revenue is:

The third baker’s Marginal Revenue Product is $600 per day.

The MRP formula

Marginal Product (MP) is the extra output produced by one additional worker. Marginal Revenue (MR) is the extra revenue earned from selling one more unit of that output.

Worked example: pizzas

Five workers produce 250 pizzas. Six workers produce 290 pizzas. Marginal Product is 290 − 250 = 40 pizzas. If each pizza sells for $15, then MR = $15, so:

The sixth worker contributes $600 in additional revenue.

MRP and the hiring decision

A restaurant hires another waiter. Daily sales rise from $4,000 to $4,600 — an extra $600, so the new waiter’s MRP is $600 per day. If the wage is $180, hiring is clearly profitable, since MRP exceeds the wage.

The general rule firms follow:

If one worker generates $800 in extra revenue for a $250 wage, that’s an easy hire — $550 in profit. But if the next worker only generates $240 while the wage is still $250, the firm loses money on that hire and should stop.

Why MRP usually falls: diminishing returns

Picture a pizza kitchen. Adding a second chef helps a lot — output rises quickly. Eventually, though, the kitchen gets crowded: workers wait for ovens, share equipment, and some stand idle. Each new worker adds less than the last one did. As Marginal Product falls, MRP falls with it. This is the Law of Diminishing Marginal Returns at work.

Once Marginal Product starts falling, MRP falls too  which is why the MRP curve slopes downward. That downward-sloping curve is actually the firm’s demand curve for labor: firms hire more workers at lower wages, and fewer at higher wages.

MRP in perfect competition vs. monopoly

In perfect competition, firms can’t influence price, so MR always equals Price, and MRP depends mainly on worker productivity and the selling price.

In monopoly, the firm faces a downward-sloping demand curve, so it must lower price to sell more. That makes Marginal Revenue smaller than Price, which means MRP is lower than it would be under perfect competition. As a result, monopolies typically hire fewer workers than perfectly competitive firms would for the same level of productivity.

Marginal Product vs. Marginal Revenue Product

What affects MRP

• Worker productivity — more skilled workers produce more output, raising MRP.
• Selling price — higher prices mean more revenue per unit sold, raising MRP.
• Technology — better machines let workers produce more, raising MRP.
• Training — well-trained employees work faster and make fewer errors, raising MRP.
• Quality of capital — modern equipment increases what each worker can produce.
• Consumer demand — when customers buy more, revenue rises, and so does MRP.

Real-world examples

Warehouse: one extra worker packs 100 extra orders, at $5 profit per order, for an MRP of $500. If the wage is $180, hiring is profitable.

Hospital: an additional nurse lets doctors see more patients. The extra patient revenue generated is the nurse’s MRP.

Software company: a new programmer builds features that attract new subscribers. The resulting subscription revenue is that programmer’s MRP.

Common student mistakes

• Confusing MRP with Marginal Product — MP measures extra output; MRP measures extra revenue.
• Using Price instead of Marginal Revenue under monopoly — Price only equals MR in perfect competition.
• Assuming firms hire unlimited workers — hiring stops once MRP equals the wage.

Frequently Asked Questions