Narrow Framing

What it is

A half-watched season gets judged on its own terms. You have put ten hours in, there are four episodes left, so you finish. Framed broadly it is one of several hundred things you could do with four hours this month, and at that point it stops looking like a commitment at all and starts looking like an option competing with other options.

The narrow frame is what allows a sunk cost fallacy to matter. Money or time already spent only looks like a reason to continue when the decision has been sealed off from everything it is competing with. Open the frame and the spend is still gone, and it is no longer arguing with anything.

It is the same sealing that gives a mental account its walls. One decision, one ledger, one balance to settle.

In effect

Where it comes from, and the demonstration behind it

Framing effects in general are well established, and this site carries them separately. Tversky and Kahneman's 1981 work is the primary source there.

The narrow-and-broad distinction is a separate claim, and it now has its own source. Kahneman and Lovallo, writing in Management Science in 1993, set out as their third general finding that people consider decision problems one at a time, sealing the current problem off from other choices pending and from future chances to decide the same kind of thing again. They called the result an isolation error, and the section is headed "Narrow Decision Frames".

Their demonstration, which they took from earlier work of Tversky and Kahneman's, is a pair of decisions put in front of someone at the same time. One offers a sure gain against a gamble for more. The other offers a sure loss against a gamble to avoid it. Most people take the safe option on the gain side and take the gamble on the loss side, which is the ordinary pattern: cautious about winning, reckless about losing. Held apart, each answer looks right. Put together, the combination people chose is beaten outright by the combination they turned down, at the same odds and for worse money either way. Nobody made a bad call on either problem. The damage was done by answering them separately.

The paper's second plank is older still. Economists had noticed that people who refuse a single favourable bet will happily take a run of the same bet, which only makes sense if the single bet was being judged as though it were the last one they would ever be offered.

This is a theoretical paper rather than a new experiment, so it should be cited for the distinction and the argument, not as a study with a result of its own.

Who gets the credit

Three names, and all three belong on the record.

Kahneman and Lovallo (1993) named the frame itself as the thing that varies, and set narrow against broad as something a decision maker can choose. Dan Lovallo is the second author and is usually dropped.

Tversky and Kahneman demonstrated the underlying isolation effect first, in 1981 and 1986, with Amos Tversky as first author. Kahneman and Lovallo credit the concurrent-decisions example directly to him.

Read, Loewenstein and Rabin (1999) gave the fullest treatment of the same idea under different vocabulary, narrow and broad bracketing. First author Daniel Read, whose name is the one most often lost when this literature gets summarised.

This site's usual failure mode is handing credit to the most famous person in the room. Here the most famous person genuinely is the first author, and the correction runs the other way: the people who go missing are Lovallo and Read.

Everyday life: what broadening actually looks like

The practical version is not "be more rational". It is changing the question. Instead of "should I finish this", the broad question is "how do I want to handle things I have started and stopped enjoying". Answering that once produces a policy, and a policy does not have to be re-argued at eleven o'clock on a Tuesday.

That reframing is an argument this publication makes, not a finding, and it is marked as such.

What it does not say

It does not come with an experiment of its own. The 1993 paper is an argument, built on demonstrations borrowed from earlier work. Cite it for the distinction, not as a study with a finding.

It does not carry a number. No effect size, no proportion, no sample. If one appears in an article citing this page, it did not come from here.

It has not been checked against the replication record. The citation is confirmed and the paper was read in full. How well the wider narrow-framing literature has held up is a separate question nobody here has answered yet, which is what primary-cited means on this site.

It is not the same as the framing effect. The parent effect, where the same choice described as a gain or a loss produces different answers, is verified and lives on its own page. This is a particular application of that idea and has not been verified separately.

It does not say narrow framing is irrational. Deciding one thing at a time is how most decisions have to be made, and the same qualification Kahneman applies to mental accounting applies here: if regret and relief are real consequences, preferences shaped by them are not automatically errors.

It does not belong to one person. Kahneman and Lovallo named it, Tversky and Kahneman demonstrated the effect underneath it, and Read, Loewenstein and Rabin built it out under the bracketing label. Any version of this history with a single name in it is wrong.

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