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Game Theory & Strategic Decision-Making

What Game Theory Actually Studies

The core idea behind game theory - decision-making where the outcome depends on what everyone else does too, not just your own choice.

Game theory studies decision-making in situations of strategic interaction - where the outcome for any one participant depends not just on their own choice, but on the choices everyone else involved makes at the same time. It’s a mathematical framework originally developed for economics, but it now shows up across business strategy, politics, biology and everyday negotiation.

Why “game” doesn’t mean recreational

In game theory, a “game” isn’t necessarily fun or recreational - it’s any structured situation with defined participants (called players), a set of possible choices (called strategies), and outcomes (called payoffs) that depend on the combination of choices everyone makes. Two competing businesses setting prices, two countries negotiating a trade deal, and two siblings dividing a cake are all “games” in this technical sense.

Why this differs from an ordinary decision

Deciding whether to bring an umbrella based on a weather forecast is an ordinary decision - the weather doesn't respond to your choice. Deciding how to price a product when a competitor might also change their price in response is a strategic interaction - the best choice depends on correctly anticipating what the other party will do, which itself depends on what they think you'll do.

Why this framework is genuinely useful

Game theory gives a structured way to reason through situations where simply optimizing your own choice in isolation isn’t enough - you have to account for how others will likely respond, and how they’ll account for how you’ll respond to that, and so on. This module works through several of the field’s most influential and widely applicable ideas.

Assuming game theory only applies to formal competition

Game theory isn't limited to obvious competitive situations like business rivalry or international negotiation - it applies to any situation where outcomes depend on multiple parties' choices, including cooperation, everyday negotiation, and even decisions within a family or friendship, as later lessons in this module explore.

Key takeaways
  • Game theory studies decisions where outcomes depend on multiple participants' choices, not just one.
  • A "game" in this context means any structured situation with players, strategies and payoffs.
  • Strategic interaction requires anticipating others' responses, not just optimizing in isolation.
  • Game theory applies well beyond formal competition, including cooperation and everyday negotiation.
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