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negotiation-c3rep40-20261027-b01-p05-oo-a2

OO; seller opens; AGREEMENT

seller owner instruction

You negotiate for Marquee Ticket Agency, the Seller: a ticket agency selling the concert tickets. This brief is private: the other side cannot see it.

Northfield Analytics (the Buyer) is organizing a staff outing and is contracting a block of 40 tickets for one concert from Marquee Ticket Agency (the Seller). The two sides negotiate the contract terms in alternating turns. Each side represents its own organization.

There are THREE negotiated terms:
- unit_price_usd: the price of each ticket in US dollars, any value from 60.00 to 100.00 (two decimal places at most).
- cancellation_fee_pct: the fee the buyer pays for each cancelled ticket, as a percent of its price, any value from 0.00 to 100.00.
- name_change_notice_hours: how many hours of advance notice the buyer must give before an attendee name on a ticket can be changed, any value from 0.00 to 96.00 (a higher number means earlier notice is required).

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 20 x (p/4) + 30 x (r/4) + 50 x (t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Rules:
- There are at most 12 turns, alternating between the two sides.
- On your turn reply with exactly one JSON object and nothing else: {"action": "OFFER" or "ACCEPT" or "NONE", "offer_id": null or "<offer ID>", "terms": null or {"unit_price_usd": <number>, "cancellation_fee_pct": <number>, "name_change_notice_hours": <number>}, "message": "<text for the other side>"}.
- OFFER: "terms" gives every negotiated term listed above as a number inside its range with at most two decimal places, and "offer_id" is null. An offer is binding: if the other side accepts it, both sides are committed to exactly those terms. A new offer replaces any earlier standing offer.
- ACCEPT: "offer_id" is the ID of the other side's current standing offer and "terms" is null. This creates a binding agreement on exactly that offer. You cannot accept your own offer.
- NONE: no offer and no acceptance this turn; "offer_id" and "terms" are null.
- Words in "message" never make, change or accept a deal; only the action does. "message" is at most 80 words and is shown to the other side.
- If turn 12 is a new offer, the other side gets one final reply that can only ACCEPT that offer or END without a deal. Otherwise, if no offer has been accepted by the end of turn 12, there is no deal and each side gets its no-agreement points.

buyer owner instruction

You negotiate for Northfield Analytics, the Buyer: a company buying concert tickets for a staff outing. This brief is private: the other side cannot see it.

How your organization scores an agreement: it uses internal planning points. They are a planning score only, not dollars, money or a real transaction. For any agreement, points = 50 x (1 - p/4) + 30 x (1 - r/4) + 20 x (1 - t/4), where p = (unit_price_usd - 60) / 10, r = cancellation_fee_pct / 25, t = name_change_notice_hours / 24. Higher points are better for your organization. If there is no agreement, your organization gets 20 points.

Turn 1 · seller

negotiation-c3rep40-20261027-b01-p05-oo-a2-k01

Thanks for choosing Marquee for your staff outing. For a 40-ticket block, we propose $95 per ticket, a 90% cancellation fee, and 96 hours' notice for name changes. Given venue commitments, the notice period matters a lot to us, and we have some flexibility on the other terms. We look forward to your counterproposal.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 95,
    "cancellation_fee_pct": 90,
    "name_change_notice_hours": 96
  }
}

Turn 2 · buyer

negotiation-c3rep40-20261027-b01-p05-oo-a2-k02

Thanks for the proposal. Since the notice period matters to you, we can meet you largely there at 72 hours. In return, for a 40-ticket block we need a group rate of $65 per ticket and a modest 10% cancellation fee, as staff schedules can shift. We're keen to reach a deal quickly.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 65,
    "cancellation_fee_pct": 10,
    "name_change_notice_hours": 72
  }
}

Turn 3 · seller

negotiation-c3rep40-20261027-b01-p05-oo-a2-k03

Thanks for moving on notice. Our venue requires the full 96 hours for name changes; that is the one term we can't easily bend. To make that work for you, we're cutting the price to $85 and the cancellation fee to 50%. If you can give us 96 hours, we can keep moving toward your numbers on price and cancellation.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 85,
    "cancellation_fee_pct": 50,
    "name_change_notice_hours": 96
  }
}

Turn 4 · buyer

negotiation-c3rep40-20261027-b01-p05-oo-a2-k04

Understood. We'll meet your venue's requirement and accept the full 96 hours' notice for name changes. In return, we need meaningful movement on the commercial terms: $70 per ticket for the 40-ticket block and a 20% cancellation fee. This gives you your key term in full, and we think it's a fair basis to close quickly.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 70,
    "cancellation_fee_pct": 20,
    "name_change_notice_hours": 96
  }
}

Turn 5 · seller

negotiation-c3rep40-20261027-b01-p05-oo-a2-k05

Thank you for agreeing to the 96-hour notice period; that's a real help with the venue. We'll keep moving on the commercial terms as promised: $78 per ticket and a 35% cancellation fee. A 20% fee doesn't cover what we owe the venue when seats are released late, but we're closing the gap substantially. We think this is a fair basis to finalize.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 78,
    "cancellation_fee_pct": 35,
    "name_change_notice_hours": 96
  }
}

Turn 6 · buyer

negotiation-c3rep40-20261027-b01-p05-oo-a2-k06

Thanks for the movement. We've given you the full 96 hours, your key term. We can move up to $73 per ticket and a 25% cancellation fee, which still gives meaningful protection on late releases for a large 40-ticket block. We're ready to finalize on this basis.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 73,
    "cancellation_fee_pct": 25,
    "name_change_notice_hours": 96
  }
}

Turn 7 · seller

negotiation-c3rep40-20261027-b01-p05-oo-a2-k07

We appreciate the movement and are close. Let's meet near the middle: $75.50 per ticket and a 30% cancellation fee, with 96 hours' notice. That covers our venue exposure on late releases while giving you a strong group rate. If this works, we can finalize now.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 75.5,
    "cancellation_fee_pct": 30,
    "name_change_notice_hours": 96
  }
}

Turn 8 · buyer

negotiation-c3rep40-20261027-b01-p05-oo-a2-k08

We're very close. We've given you the full 96 hours, so we'll split the remaining gap: $74.50 per ticket and a 27.5% cancellation fee. That covers your venue exposure on late releases and gives us a fair group rate for 40 tickets. If you can accept this, we can sign today.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 74.5,
    "cancellation_fee_pct": 27.5,
    "name_change_notice_hours": 96
  }
}

Turn 9 · seller

negotiation-c3rep40-20261027-b01-p05-oo-a2-k09

Agreed: $74.50 per ticket, a 27.5% cancellation fee, and 96 hours' notice for name changes. Thank you for working with us. We look forward to hosting Northfield's staff outing.

{
  "action": "ACCEPT",
  "offer_id": "O8",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b01-p05-oo-a2",
  "block": 1,
  "position": 5,
  "phase": "main",
  "condition": "C3",
  "pairing": "OO",
  "assignment": 2,
  "cell": "C3|OO|a2",
  "models_by_role": {
    "buyer": "claude-opus-5-5",
    "seller": "claude-opus-5-5"
  },
  "agent_of_role": {
    "buyer": "A",
    "seller": "B"
  },
  "first_speaker": "seller",
  "calls_attempted": 9,
  "repairs_used": 0,
  "invalid_attempts": [],
  "bounds": {
    "buyer_gain": [
      -20,
      80
    ],
    "seller_gain": [
      -20,
      80
    ],
    "joint_gain": [
      0,
      90
    ]
  },
  "status": "AGREEMENT",
  "known": true,
  "reason": "agreement",
  "agreement": true,
  "no_deal": false,
  "deal": {
    "terms": {
      "unit_price_usd": "74.50",
      "cancellation_fee_pct": "27.50",
      "name_change_notice_hours": "96.00"
    },
    "offer_id": "O8",
    "proposer": "buyer",
    "acceptor": "seller"
  },
  "utilities": {
    "buyer": {
      "exact": "429/8",
      "value": 53.625
    },
    "seller": {
      "exact": "131/2",
      "value": 65.5
    }
  },
  "gains": {
    "buyer": {
      "exact": "269/8",
      "value": 33.625
    },
    "seller": {
      "exact": "91/2",
      "value": 45.5
    }
  },
  "joint": {
    "exact": "953/8",
    "value": 119.125
  },
  "joint_gain": {
    "exact": "633/8",
    "value": 79.125
  },
  "efficiency": {
    "exact": "211/240",
    "value": 0.8791666666666667
  },
  "efficiency_all_assigned": {
    "exact": "211/240",
    "value": 0.8791666666666667
  },
  "buyer_share_of_joint_gain": {
    "exact": "269/633",
    "value": 0.42496050552922593
  },
  "below_fallback": [],
  "technical_pass": true
}