Competitive Strategy: Techniques for Analyzing Industries and Competitors

Before 1980, company strategy was discussed almost in the realm of guesswork: intuition, a nose for the market, copying what worked somewhere else. Michael Porter, a Harvard professor, brought in a way of thinking from industrial economics: analyze the industry before deciding on any move.

The book's question is not just whether the company is good, but whether the industry's market structure allows real profit, and where the company sits within it. Two bakeries can have the same talent and make money in different ways, depending on how each one positions itself against competitors, suppliers and customers.

This way of looking at things became standard in business courses, and that's why the book is still cited decades later: it doesn't teach a recipe, it teaches a map for understanding why similar businesses sustain profit in different ways.

Porter sums up an industry's fight over profit in five forces that push price and margin down. It's not just the competitor on the corner who decides whether your business does well, it's the combination of five pressures.

The five are: the threat of new competitors entering the market, the bargaining power of those who sell you supplies, the bargaining power of those who buy from you, the threat of a substitute product taking your place, and the direct rivalry among those already fighting for the same customer.

Picture the neighborhood bakery competing with the supermarket that also sells bread, with the flour distributor who raises prices whenever he wants, with the customer who compares everything in the neighborhood group chat, and with the corner shop that just cut the price of its breakfast. Five fronts, and just one bakery to hold it all together.

The first force is the threat from those who aren't in the market yet but could enter. The easier it is to set up a business like yours, the less room you have to charge a better price.

What holds back that entry is called an entry barrier: high capital requirements, economies of scale that only those already big can reach, or the loyalty customers already have to businesses that have been around for years. A traditional hair salon survives because longtime customers don't switch for no reason, even if a cheaper new salon opens down the block.

There's also the effect of expected retaliation: if the big players will slash prices aggressively as soon as a small competitor shows up, many people won't even try to open the business. The threat of entry sometimes protects more than the entry itself.