Understanding the Keynesian Beauty Contest

Matthew·

Game Theory

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At a Glance

SubjectGame Theory

Original Prompt

The Keynesian Beauty Contest (Guess 2/3 of the Average): Design a competition entry slip for the "Guess 2/3 of the Average" game. Students pick a number between 0 and 100, trying to guess 2/3 of the average of all guesses. Include a worksheet explaining "Level-k thinking" (Level 0 picks random, Level 1 assumes random, Level 2 assumes Level 1).

This learning resource delves into the concept of the 'Keynesian Beauty Contest', inspired by economist John Maynard Keynes. It illustrates the strategic reasoning and multiple levels of thinking needed in game theory. The contest simulates how players must predict crowd behavior, rather than solely relying on their individual preferences, making it a valuable analogy for understanding behaviors in financial markets. The document outlines how to play the game, introducing Levels of Thought from random guessing to more strategic predictions based on opponents' assumptions. It discusses the Nash Equilibrium and the practical implications of bounded rationality in real-world scenarios, encouraging students to reflect on their strategies and the psychological factors at play. Additionally, it draws connections to broader applications in financial markets, economic decisions, and political strategy.