You learn about and the "Grim Trigger" strategy. The math shows that if you are going to interact with someone forever (your neighbor, your boss, your spouse), cooperation is actually the rational choice.
Let me be honest with you. I walked into my first Game Theory lecture expecting a semester of The Dark Knight . I thought I’d spend fifteen weeks watching clips of the Joker blowing up ferries and nodding wisely about "rational actors."
But then the professor introduces the . It proves that rational players will betray each other immediately , even though waiting would make them both millionaires. Game Theory Lectures
It is a difficult class. It is a math-heavy class. But if you stick with it through the lecture on Bayesian Games, you will realize you aren't just learning economics. You are learning the operating system of human strategy.
This is where the professor tells you that to play optimally in a game like Rock-Paper-Scissors (or soccer penalty kicks), you have to randomize. You have to calculate the exact probability (p) that makes your opponent indifferent between their options. You learn about and the "Grim Trigger" strategy
You look up from your notes. You realize your friend just bluffed you in a negotiation yesterday. Your brain tingles. That’s the dopamine hit of a good lecture. Everyone loves the Pure Strategy lectures. They are clean. "If they go left, I go right." But then comes Lecture 7: Mixed Strategies .
You learn to solve this via Backward Induction . You start at the end of the game and rewind. Suddenly, you realize the Monopolist is bluffing. A price war hurts them more than you. Therefore, the Entrant should always enter. I walked into my first Game Theory lecture
But then, around the third lecture, something clicked. Suddenly, I wasn't just solving equations. I was realizing why traffic jams happen, why companies lower prices until no one makes a profit, and why my roommate never washes the dishes. Game Theory lectures don't just teach you math—they teach you how to read the room of reality .