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Lecture 9 - Mixed Strategies in Theory and Tennis

Uses tennis to derive mixed-strategy equilibria and explains why the pure strategies used in an optimal mixture must have equal expected payoffs.

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Why it is here

A focused bridge from probability-weighted payoffs to strategic randomisation; attempt the worked game before continuing to other interpretations of mixtures.

Selection basis: institutional collection. Reason checked 2026-11-07 by agent.

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Level basis
Editorial judgement: the official course requires introductory microeconomics and uses one-variable calculus, probability and expectation. The introductory subject title does not mean that no preparation is needed.
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Provenance and reuse

Open Yale Courses; original source https://oyc.yale.edu/economics/econ-159/lecture-9. Link by default. Source terms require credit to original faculty, Yale and the course URL, plus licence. Inspect individual credits before copying. Commercial reuse and third-party assets require separate review.. Links, factual metadata and original navigation annotations only. No source page, transcript, image, video or restricted platform metadata is included in the reusable export.

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