We test the effect of players' moods on their behavior in a gift-exchange game. In the first stage of the game, player 1 chooses a transfer to player 2. In the second stage, player 2 chooses an effort level. Higher effort is more costly for player 2, but it increases player 1's payoff. We say...

Social facilitation describes the effect on performance due to the mere presence of others. Here we study the effect of the mere presence of an audience on the behavior of people involved in a strategic interaction and on the performance of institutions. In our laboratory experiment, two active...