Decisions & Games Lab

Choosing under ignorance and risk; games

Size

Decision Lab

Choosing under ignorance and under risk

Text size

Setup

Probabilities

Utilities

Random problem

Your own problem

Mode

Entering numbers

Utilities can be whole numbers, decimals or fractions: 3, −1, 1.5, 7/10. Probabilities can be decimals or fractions: 0.7 or 7/10. Answers you type in Practice can be fractions, or decimals rounded to two places.

Click an option or state name in the matrix to rename it (P, M, R, ¬R…). Type ~ for ¬. Press Enter or click Done to use it.

Your own problem

Changed. Press Enter or click Done to use it.

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Setup

Game

Classic games

Random problem

Your own problem

Mode

Reading the matrix

Row chooses a row and Column chooses a column. In a general game each cell shows two payoffs: Row’s first, Column’s second.

In a zero-sum game each cell shows only Row’s payoff. Column gets the negative of it, so Row wants the numbers high and Column wants them low.

Click a strategy name in the matrix editor to rename it (C, D, Stag, Hare…). Payoffs can be whole numbers, decimals or fractions. Press Enter or click Done to use it.

Your own game

Changed. Press Enter or click Done to use it.

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