Introduction: Why Do Firms Do What They Do?

Welcome to one of the most interesting parts of Economics! You might think that every business in the world has just one simple goal: to make as much money as possible. While making money is definitely important, real-world businesses are much more complex.

In this chapter, we will explore the different goals (objectives) that firms have and the different policies they use to reach them. Understanding this helps us predict how a business will react when prices change or when a new competitor enters the market. Don’t worry if some of the terms seem a bit "business-heavy" at first—we’ll break them down using simple examples from everyday life!

1. The Traditional Objective: Profit Maximisation

In classical Economics, we usually assume that the main goal of any firm is Profit Maximisation. This means the firm wants to make the biggest possible gap between the money they take in (Revenue) and the money they spend (Costs).

How do they achieve this?

A firm maximises profit when it produces at the exact point where:
\( MC = MR \)

Where:
\( MC \) (Marginal Cost) is the cost of producing one more unit.
\( MR \) (Marginal Revenue) is the money earned from selling one more unit.

The Analogy: Imagine you are eating at an "all-you-can-eat" buffet. You keep eating as long as the "benefit" of the next slice of pizza is higher than the "pain" of feeling too full. A firm does the same: it keeps producing as long as the extra money it gets (\( MR \)) is at least equal to the extra cost it pays (\( MC \)).

Why choose this?

1. To provide higher dividends (payments) to shareholders.
2. To have more money to reinvest in better technology.
3. To build up a "safety net" of cash for hard times.

Quick Review: To maximise profit, always look for the point where \( MC \) meets \( MR \)!

2. Growing Big: Revenue and Sales Maximisation

Sometimes, a firm isn't worried about profit *right now*. Instead, they want to get as big as possible as fast as possible. This is very common with tech startups like Uber or Netflix in their early years.

A. Revenue Maximisation

This is when a firm wants to bring in the most total money possible. This happens at the point where:
\( MR = 0 \)

Example: A stadium might lower ticket prices just enough to ensure they get the maximum total cash from sales, even if the cost of cleaning up after a full crowd is high.

B. Sales Maximisation (Growth)

This is when a firm wants to sell as many units as possible without actually making a loss. They produce at the point where:
\( AC = AR \) (Average Cost = Average Revenue)

This is often called the "break-even" point for the largest possible output.

Did you know? Firms often choose Sales Maximisation to kick competitors out of the market. By selling a lot at a low price, they become the "household name" that everyone buys from.

Key Takeaway: Profit Max is about the gap between money in and out. Revenue/Sales Max is about the volume of money or customers coming in.

3. Satisficing: "Good Enough" is Enough

In many large companies, there is a divorce of ownership and control. This means the people who own the business (shareholders) are not the same people who run it (managers).

The Principal-Agent Problem

This is a fancy term for a simple problem:
- The Owners (Principals) want maximum profit.
- The Managers (Agents) might want a quiet life, a nice office, and just enough profit to keep the owners from firing them.

Satisficing is a mix of the words "Satisfy" and "Suffice." It means the managers aim for a target level of profit that keeps shareholders happy, but then they focus on other goals, like giving themselves better perks or reducing their own stress levels.

Common Mistake: Don't confuse Satisficing with Sacrificing. Satisficing is about doing "just enough" to get by, not giving things up for others!

4. Other Modern Objectives

Not all firms are just looking at the math. Many modern businesses have goals that reflect the world we live in today:

  • Survival: In a recession or during a pandemic, a firm's only goal might be to stay in business. They may sell goods at a loss just to keep some cash flowing.
  • Ethical and Environmental Goals: Some firms (Social Enterprises) prioritize being "green" or paying fair wages over making a huge profit. Example: A coffee shop that only buys Fairtrade beans, even if it costs them more.
  • Public Service: Government-owned firms often aim to provide a service to everyone at a low price rather than making money.

5. Summary Table: Where do they produce?

If you find the graphs tricky, try to memorize this simple "Cheat Sheet" for your exams:

1. Profit Maximisation: \( MC = MR \)
2. Revenue Maximisation: \( MR = 0 \)
3. Sales Maximisation: \( AC = AR \)
4. Allocative Efficiency (Best for Society): \( P = MC \)

Quick Review Quiz (Mental Check!)

Q: If a manager wants to make the most money possible from sales, regardless of cost, what is the rule?
A: \( MR = 0 \) (Revenue Maximisation).

Q: Why might a firm choose to "Satisfice"?
A: Because the managers want to do "just enough" to keep shareholders happy while making their own jobs easier.

Don't worry if this seems tricky at first! In Economics, we use these models to simplify the real world. Just remember: different bosses have different goals, and those goals change where they set their prices and how much they produce.