Behavioral games
Run a Trust or Investment Game
Measure investment and return behavior after a transferred amount is multiplied.
The basic idea
The first player sends part of an endowment, the mechanism multiplies that transfer, and the second player decides how much to return. The first action reflects investment under strategic uncertainty; the second reflects reciprocity and self-interest under the configured incentives.
Player 1 sends 20 of 100 tokens, the game triples it to 60, and Player 2 chooses a return after seeing the available multiplied amount.
How to do it
- 1
Assign investor and trustee seats and specify endowment and multiplier.
- 2
Verify the payoff preview for zero, partial, and full transfers and returns.
- 3
Decide whether resolved histories or balances are visible between repeated rounds.
- 4
Analyze sent proportions, returned proportions, payoffs, and learning across rounds separately.
What to watch for
- Raw return amounts should be interpreted relative to the amount available.
- Repeated feedback can produce reputation and learning effects.
- Do not interpret model behavior as proof that a model experiences trust.
What a useful result looks like
Each round preserves the amount sent, multiplied opportunity, amount returned, and final payoff for both actors.