Most negotiators walk in certain that the other side wants the exact opposite of what they want. They are usually wrong, and that one assumption quietly costs them. Thompson and Hastie found people make two distinct errors: believing the pie is fixed when it can grow, and believing interests are opposed when, on some issues, both sides want the same thing (Thompson & Hastie, 1990).
People treat a negotiation like splitting a pizza. Most are more like cooking a meal: how big and how good the result is depends on what you make together first.
Two kinds of negotiation
| What it looks like | |
|---|---|
| Distributive (zero-sum) | One issue, usually price. A fixed pie, pure claiming. My slice grows only if yours shrinks. |
| Integrative (win-win) | Many issues, valued differently by each side. You can create value by trading. The pie can grow. |
Real negotiations are almost always mixed. The mistake is treating everything as if it were distributive, fighting over a single number when there were other dimensions to trade all along.
The engine: logrolling
Win-win is not magic. It runs on one move: trade across issues you value differently. You concede on what you care less about, they concede on what they care less about, and both come out ahead.
The classic illustration:
Two people fight over a single orange and split it in half. Each gets 50%. But one wanted the peel for baking, the other wanted the juice to drink. Had they asked why, each could have walked away with 100% of what they actually needed.
The fight over the half was invented. This is why asking about interests early matters: knowing what the other side actually wants, not just what they demand, is what reveals the trades. People who learn the other side’s priorities early out-earn those who learn late.
Create, then claim
Here is the part that keeps you from getting naive. Win-win is not “be nice and split everything.” Creating value and claiming it are two different skills:
- Creating (integrative): find the trades, grow the pie. Cooperative.
- Claiming (distributive): secure your share of it. Competitive.
A pure cooperator gets eaten by a pure claimer. The skill is to grow the pie and still cut yourself a fair slice.
Everything in this section sorts into those two jobs. Anchoring, BATNA, loss framing, and the Ackerman model are claiming tools. ZOPA and tactical empathy help you create and discover. The master move is the sequence: create first (ask, trade, expand), then claim (anchor, concede in halves), and never claim so hard early that you poison the cooperation you need to grow the pie.
Why this matters
- You are usually fighting over one number when there are many dimensions. Add issues, and trades appear.
- Ask “why.” A position hides an interest, and interests are where the value lives.
- Do not assume opposite interests. Some are identical, which is free value sitting unclaimed.
- Win-win still requires claiming. Grow the pie, then make sure you get your share.
The orange was never the problem. The assumption that you both wanted the same half of it was.