Each of 4 people simultaneously chooses whether to contribute a fixed amount toward the provision of a public good. The good is provided if and only if at least 2 people or more contribute. If the good is not provided, contributions are not refunded. Each person ranks outcomes from best to worst as follows: (i) any outcome in which the good is provided and she does not contribute, (ii) any outcome in which the good is provided and she contributes, (iii) any outcome in which the good is not provided and she does not contribute, (iv) any outcome in which the good is not provided and she contributes. Is there a Nash equilibrium in which more than 2 people contribute? One in which 2 people contribute? One in which fewer than 2 people contribute