Reject the fixed-pie assumption
Stop assuming your gain must be their loss — most negotiations have hidden joint gains.
Key takeaways
- What it is: Stop assuming your gain must be their loss — most negotiations have hidden joint gains.
- Why it works: The "fixed-pie bias" is the default belief that interests are perfectly opposed, which makes people miss compatible interests entirely and settle for worse deals. Consciously assuming there are differences to exploit reorients you from claiming to creating, which is where the extra value comes from.
- Evidence: Backed by observational / correlational evidence.
- Avoid: Walking in certain it’s zero-sum, which becomes self-fulfilling — you never look for the trades that would have grown the deal.
Why it works
The "fixed-pie bias" is the default belief that interests are perfectly opposed, which makes people miss compatible interests entirely and settle for worse deals. Consciously assuming there are differences to exploit reorients you from claiming to creating, which is where the extra value comes from.
How to do it
- 1Before bargaining, list ways your interests might actually align or differ usefully.
- 2Assume joint gains exist until proven otherwise, rather than the reverse.
- 3Ask questions aimed at finding differences in priority, not just points of conflict.
What the evidence says
ObservationalThe fixed-pie bias and its cost are well documented in negotiation research; people routinely overlook compatible and integrative options.
Honest caveat: Some negotiations really are mostly distributive (e.g. a one-time price with no other variables); win-win isn’t always available.
Common mistake
Walking in certain it’s zero-sum, which becomes self-fulfilling — you never look for the trades that would have grown the deal.
IX Coach helps you challenge the fixed-pie story before a negotiation and hunt for the joint gains you’d otherwise miss.
Practice this with IX Coach →