Breaking news: expensive wine really does taste better

A report in this week's Economist on the latest twist in the "do we get what we pay for when we buy expensive wine" issue:

The scanner showed that the activity of the medial orbitofrontal cortices of the volunteers increased in line with the stated price of the wine. For example, when one of the wines was said to cost $10 a bottle it was rated less than half as good as when people were told it cost $90 a bottle, its true retail price. Moreover, when the team carried out a follow-up blind tasting without price information they got different results. The volunteers reported differences between the three "real" wines but not between the same wines when served twice.

Nor was the effect confined to everyday drinkers. When Dr Rangel repeated the experiment on members of the Stanford University wine club he got similar results. All of which raises the question of what is going on.

There are at least two possibilities. The point of learning is to improve an individual's chances of surviving and reproducing: if the experience and opinions of others can be harnessed to that end, so much the better. Dr Rangel suspects that what he has found is a mechanism for learning quickly what has helped others in the past, and thus for allowing choices about what is nice and what is nasty to be made speedily and efficiently. In modern society, price is probably a good proxy for such collective wisdom.