Trade across issues where each side has different priorities

Give the counterpart what they care most about; get what you care most about — logrolling is only possible when interests differ.

Why it works

Logrolling (trading concessions on low-priority issues for gains on high-priority ones) is the core mechanism of integrative bargaining. It creates value because each party trades something they value less for something they value more — both sides gain relative to their walk-away, producing a larger joint surplus than any positional split would. The mechanism only operates when priorities differ, which is why understanding both sides’ interest rankings is essential.

How to do it

1. Identify your top priority issue and which issues matter less to you but more to the counterpart.
2. Make an explicit trade: "I’ll accept your terms on X if we can agree on my terms for Y."
3. Package trades rather than trading one issue at a time — packages allow more creative combinations and prevent issue-by-issue hardball.

Evidence

Logrolling as an integrative bargaining strategy is among the most studied and most robustly supported tactics in negotiation research. Laboratory studies show consistent joint gain from trading across differently-valued issues. (rct)

Logrolling requires interest disclosure to function — if neither side reveals priorities, trading based on guessed priorities may not produce genuine value for both.

Sources

• Froman & Cohen (1970), early experimental study of logrolling
• Pruitt & Lewis (1975), integrative solution quality in negotiation, Journal of Personality and Social Psychology

Common mistake

Making equal concessions on every issue rather than concentrating concessions where they cost you least and are worth most to the counterpart — equal splitting leaves the logrolling surplus uncaptured.