Welcome to the World of Firms!
Ever wondered why a cup of coffee costs $6 at a fancy cafe but only $1.20 at a hawker centre? Or why Apple releases a new iPhone every year? In this chapter, we step into the shoes of business owners. We will explore how firms decide what price to charge, how much to produce, and what strategies they use to beat their competitors. Understanding this is key to seeing how the economy works from the "supply side."
1. What Do Firms Want? (Objectives of Firms)
Most people think firms only care about money. While Profit Maximisation is the primary goal, it’s not the only one!
A. The Gold Standard: Profit Maximisation
Profit is simply the difference between Total Revenue (TR) and Total Cost (TC).
\( \text{Profit} = \text{TR} - \text{TC} \)
To find the exact point where profit is highest, firms look at the "next unit" produced. This is called the Marginalist Principle. A firm maximises profit when:
\( \text{MR} = \text{MC} \) (and MC must be rising).
Analogy: Think of eating at a buffet. You keep eating as long as the "benefit" of the next plate is higher than the "discomfort" it causes. Firms do the same: they produce as long as the extra money coming in (MR) is at least equal to the extra cost of making it (MC).
B. Alternative Objectives
Don't worry if this seems odd, but sometimes firms choose not to maximise profit immediately:
- Revenue Maximisation: To gain attention or push out rivals, a firm might try to sell as much as possible until MR = 0.
- Market Share Dominance: Firms might lower prices just to become the "big fish" in the pond.
- Profit Satisficing: Managers might aim for a "good enough" profit to keep shareholders happy while avoiding too much stress or risk.
Quick Review: Most firms aim for \( MR = MC \), but some prioritize being famous (Market Share) or "just okay" (Satisficing).
2. Costs and Revenue: The Long and Short of It
Firms need to understand their costs before they can make decisions.
Short Run vs. Long Run
- Short Run: At least one factor of production (like the size of the factory) is fixed.
- Long Run: All factors are variable. The firm can build bigger factories or buy more machines.
Economies of Scale (EOS)
As a firm grows larger in the Long Run, it often becomes more efficient, and its Average Cost (AC) falls. This is called Internal Economies of Scale.
- Technical EOS: Buying big, expensive machines that are very efficient.
- Marketing EOS: Spreading advertising costs over a million products instead of just ten.
External Economies of Scale: These happen when the entire industry grows. For example, if all tech firms move to one area (like Silicon Valley), they all benefit from better roads and specialized workers nearby.
Watch Out! If a firm gets too big, it might suffer from Diseconomies of Scale. This happens because it becomes hard to manage thousands of employees, leading to "red tape" and slow communication.
Key Takeaway: Getting bigger usually lowers costs (EOS), but getting "too big" can make things messy and expensive (Diseconomies).
3. The Playing Field: Market Structures
How a firm behaves depends on who else is in the market. Economists group markets into four types:
- Perfect Competition: Thousands of tiny firms selling identical things (e.g., local vegetable stalls). No one has power over price.
- Monopolistic Competition: Many firms selling slightly different things (e.g., hair salons or cafes). They use branding to stand out.
- Oligopoly: A few giant firms dominate (e.g., Telcos like Singtel/Starhub). They watch each other’s moves very closely.
- Monopoly: Only one firm (e.g., PUB for water). They have the most power but are often regulated.
Barriers to Entry
Why don't new firms just join a profitable market? Barriers to Entry stop them! These include high start-up costs, patents, or brand loyalty.
4. Strategic Decisions: Pricing and Beyond
Firms don't just sit there; they take action to increase revenue and lower costs.
A. Pricing Strategies
Third-Degree Price Discrimination: This is when a firm charges different prices to different groups of people for the same product.
Example: Student discounts at the cinema. Students are "price sensitive," so they get a lower price, while working adults pay the full price.
B. Non-Price Strategies
- Product Differentiation: Making your product look "special" through marketing or innovation (R&D).
- Collusion: In an oligopoly, firms might secretly agree to keep prices high. (Note: This is usually illegal!)
C. The "Shut-Down" Decision
When things go wrong, should a firm close?
1. In the Short Run, a firm stays open if it can cover its Variable Costs (like wages and electricity), even if it's making a loss on its fixed costs (like rent).
2. In the Long Run, if it can't make a profit, it's time to Shut Down.
Memory Trick: "Short run, keep the lights on if you can pay the bill. Long run, leave if you can't pay the rent!"
5. Human Behavior: Cognitive Biases
Firms aren't always perfectly rational because humans run them! Firms also exploit consumer biases:
- Sunk Cost Fallacy: Continuing a project just because you've already spent a lot of money on it, even if it's failing.
- Loss Aversion: People hate losing $10 more than they love winning $10. Firms use "limited time offers" to play on this fear of losing out.
- Salience Bias: Consumers focus on the most "visible" information (like a "50% OFF" sign) and ignore the small print.
6. The Impact: Is it Good for Us? (Efficiency)
We judge a firm's strategy by three types of Efficiency:
- Allocative Efficiency: Producing exactly what society wants (\( P = MC \)).
- Productive Efficiency: Producing at the lowest possible cost.
- Dynamic Efficiency: Improving over time through new tech and innovation.
Did you know? A Monopoly is usually not allocatively efficient (prices are too high), but it might be the only one with enough money to be dynamically efficient (investing in huge R&D projects).
Common Mistake to Avoid: Don't assume monopolies are always "bad." While they charge more, they can achieve massive Economies of Scale that small firms can't, potentially leading to lower prices for you in the long run!
Summary: The "Big Picture"
Firms are strategic actors. They aim for Profit (\( MR=MC \)), navigate Costs (EOS), react to Competition, and use Pricing and Non-Price strategies to survive. Their decisions affect our Consumer Welfare (the quality, variety, and price of what we buy). When you study this, always ask: "Is this firm trying to lower costs, raise revenue, or just keep rivals away?"