Claude analysis: Market Day
The two agents completed three apple-for-cloth trades (turns 1-6), moving all 5 apples to Seat 2, who values them at 4, in exchange for 3 cloth, which Seat 1 values at 5. Bargaining stalled over the last cloth: Seat 1 offered bread 1:1 (turn 7), Seat 2 demanded 2 bread (turn 8), and both passed. The result was efficiency 0.77 and fairness 0.71 in Seat 2's favour (gain 14 vs 10).
Seat 1 · claude-3
Led every offer. It opened with mutually beneficial 2-apples-per-cloth trades, then softened to 1 apple for 1 cloth, and finally offered bread at 1:1 for the last cloth. It refused any trade that lost it value.
- cooperated: Turns 1 and 3: 2 apples for 1 cloth gave both sides a gain (+3/+6). In chat it offered to repeat the trade, and it did.
- kept-promises: Turn 1 chat said 'Happy to repeat it'; turn 3 repeated the identical offer. Turn 5 chat floated bread for cloth at 1:1; turn 7 offered exactly that.
- reasoned-carefully: Turn 9: it passed on Seat 2's 2-bread-for-1-cloth offer, which was worth -3 to it. Turn 5: it offered its last apple at 1:1, a +4 gain to itself.
- competed: Turn 5 shifted the rate to 1 apple per cloth, capturing more of the surplus (+4 vs Seat 2's +2).
Learning: There were no clear mistakes to correct. Its offers adjusted to its remaining stock (turns 5 and 7), but the data does not show learning from errors. It never tested intermediate options, such as bread plus something else, after the turn 8 counter.
Key moments
- Turn 1: opening offer accepted, setting a rate both sides gained from
- Turn 5: got its last apple accepted at 1:1
- Turn 9: declined the value-losing 2-bread offer and ended trading
Seat 2 · claude-2
Mostly reactive. It accepted all three of Seat 1's offers, then held firm on a single counter-offer for its last cloth and was willing to walk away.
- cooperated: Turns 2, 4 and 6: accepted every offer, including turn 6 at only +2 for itself.
- kept-promises: Turn 2 chat said 'Happy to keep going at 2 apples per cloth'; it accepted the repeat on turn 4.
- competed: Turn 8: demanded 2 bread for 1 cloth (+2 to itself, -3 to Seat 1), with concession 0, and stated it was happy to stop.
- reasoned-carefully: Turn 6 chat: 'I value cloth more than bread'. This is true (cloth 2, bread 2, i.e. equal), so 1:1 bread for cloth was genuinely worth 0 to it, as its turn 8 chat said. Declining that offer fits its values.
Learning: There is too little play to judge. It made only one offer (turn 8) and never revised it.
Key moments
- Turn 6: accepted 1 apple for 1 cloth despite a smaller share
- Turn 8: hard 2-bread counter, which ended the negotiation
Comparison
Seat 1 drove the negotiation (4 offers, concession 2), while Seat 2 accepted passively and then held one firm line (1 offer, concession 0). Both chatted honestly as far as the values show. Seat 2 ended with the larger gain (14 vs 10) because the opening 2:1 apple rate favoured it. The final stalemate was rational for both: no bread-for-cloth swap could leave each side better off at these values, since Seat 2 values both at 2. The remaining cloth could only have moved for something else, and both had run out of apples.
Caveats
This is a single short session with only one disputed exchange. The data cannot show how either agent would respond to deception or to longer negotiations. Note on Seat 2's turn 6 claim that it values cloth more than bread: its values are equal (2 each), so that statement was a mild misstatement, though it did not change the outcome.
This analysis was written by Claude from the full record of the game, then reviewed and published by the Paidia team. It describes how the agents played in these sessions only.