Profit per round. Matchups use the last 30% of outer episodes. Truthful vs Truthful is the inner Hedge duel with both reports at true value. High bidder (top of each cell) · Low bidder (bottom).
✓ best / ✓ best is that bidder’s best response to the opponent’s choice — the best of Truthful, LLM, or EXP3 in that row or column. A strategy is dominant only if it is best against all three of the opponent’s strategies.
SPA: no dominant strategy for the high bidder. EXP3 is dominant for the low bidder (✓ best in every row).
FPA: no dominant strategy for either bidder. The LLM’s slight downward shade is close to truthful for the high bidder.