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negotiation-c3rep40-20261027-b02-p08-hh-a4

HH; buyer opens; AGREEMENT

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.

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 = 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.

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.

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.

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.

Turn 1 · buyer

negotiation-c3rep40-20261027-b02-p08-hh-a4-k01

Northfield Analytics would like to book a block of 40 tickets for our staff outing. We're proposing $61.00 per ticket, a 5% cancellation fee per cancelled ticket, and 12 hours' notice for name changes. We're happy to discuss adjustments that work for both sides.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 61,
    "cancellation_fee_pct": 5,
    "name_change_notice_hours": 12
  }
}

Turn 2 · seller

negotiation-c3rep40-20261027-b02-p08-hh-a4-k02

Thank you for booking a block for your staff outing. $61 per ticket with a 5% cancellation fee and 12 hours' notice is below what we can offer for a group of this size at a sold-out-demand concert. Our proposal: $95.00 per ticket, a 40% cancellation fee, and 36 hours' notice for name changes. We're open to discussing a middle ground on price.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 95,
    "cancellation_fee_pct": 40,
    "name_change_notice_hours": 36
  }
}

Turn 3 · buyer

negotiation-c3rep40-20261027-b02-p08-hh-a4-k03

Thank you for the detailed proposal. $95 per ticket is well above our budget for a staff outing. We can move up from $61 to $78 per ticket. We can also accept a 15% cancellation fee and 18 hours' notice for name changes. Those terms are a reasonable middle ground for a block of 40 and a sold-out event. We'd like to close this at these terms if you can meet us there.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 78,
    "cancellation_fee_pct": 15,
    "name_change_notice_hours": 18
  }
}

Turn 4 · seller

negotiation-c3rep40-20261027-b02-p08-hh-a4-k04

We appreciate the move to $78, but our block of 40 is at sold-out demand. Our offer: $88.00 per ticket, a 30% cancellation fee, and 30 hours' notice for name changes. This keeps the price within reach of your budget while covering our inventory risk on a sold-out event.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 88,
    "cancellation_fee_pct": 30,
    "name_change_notice_hours": 30
  }
}

Turn 5 · buyer

negotiation-c3rep40-20261027-b02-p08-hh-a4-k05

We appreciate the movement toward our budget. We can go to $83 per ticket, a 22% cancellation fee, and 24 hours' notice for name changes. This keeps the price within our range while the fee and notice terms are closer to your inventory-risk concerns. We'd like to close on these terms.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 83,
    "cancellation_fee_pct": 22,
    "name_change_notice_hours": 24
  }
}

Turn 6 · seller

negotiation-c3rep40-20261027-b02-p08-hh-a4-k06

We're close. Our block of 40 is at sold-out demand, so we need more protection on fees and notice than in O5. We can meet you on price at $85 per ticket, with a 27% cancellation fee and 30 hours' notice for name changes. This is our best move toward your budget.

{
  "action": "OFFER",
  "offer_id": null,
  "terms": {
    "unit_price_usd": 85,
    "cancellation_fee_pct": 27,
    "name_change_notice_hours": 30
  }
}

Turn 7 · buyer

negotiation-c3rep40-20261027-b02-p08-hh-a4-k07

Northfield accepts O6: $85.00 per ticket, a 27% cancellation fee, and 30 hours' notice for name changes. Thank you for working with us to close this block of 40.

{
  "action": "ACCEPT",
  "offer_id": "O6",
  "terms": null
}

Recorded outcome

{
  "unit_id": "negotiation-c3rep40-20261027-b02-p08-hh-a4",
  "block": 2,
  "position": 8,
  "phase": "main",
  "condition": "C3",
  "pairing": "HH",
  "assignment": 4,
  "cell": "C3|HH|a4",
  "models_by_role": {
    "buyer": "claude-haiku-5-5",
    "seller": "claude-haiku-5-5"
  },
  "agent_of_role": {
    "buyer": "B",
    "seller": "A"
  },
  "first_speaker": "buyer",
  "calls_attempted": 7,
  "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": "85.00",
      "cancellation_fee_pct": "27.00",
      "name_change_notice_hours": "30.00"
    },
    "offer_id": "O6",
    "proposer": "seller",
    "acceptor": "buyer"
  },
  "utilities": {
    "buyer": {
      "exact": "272/5",
      "value": 54.4
    },
    "seller": {
      "exact": "1449/40",
      "value": 36.225
    }
  },
  "gains": {
    "buyer": {
      "exact": "172/5",
      "value": 34.4
    },
    "seller": {
      "exact": "649/40",
      "value": 16.225
    }
  },
  "joint": {
    "exact": "725/8",
    "value": 90.625
  },
  "joint_gain": {
    "exact": "405/8",
    "value": 50.625
  },
  "efficiency": {
    "exact": "9/16",
    "value": 0.5625
  },
  "efficiency_all_assigned": {
    "exact": "9/16",
    "value": 0.5625
  },
  "buyer_share_of_joint_gain": {
    "exact": "1376/2025",
    "value": 0.6795061728395062
  },
  "below_fallback": [],
  "technical_pass": true
}