When Expensive Means "Good": Price as a Signal of Quality

Why people often judge quality by price when they can't assess it directly, what experiments with wine and pills found, and how sellers use this.

When buyers can’t easily judge a product’s quality, they often use price as a clue: if it costs more, it must be better. This is called price-quality inference.

Why people use price as a signal

Information gaps: consumers can’t test wine, medicines, cosmetics or services before buying.
Market logic: better products often do cost more to make.
Reputation: high-priced brands may invest more in quality to protect their name.

The wine experiment

In a 2008 study, researchers including Hilke Plassmann gave participants the same wine but told them it had different prices. People reported enjoying the “90 dollar” wine more than the same wine labelled “10 dollars”. Brain scans showed increased activity in areas linked to pleasure, suggesting the price changed the experience itself.

The painkiller experiment

Another 2008 study by Rebecca Waber, Dan Ariely and colleagues gave people identical placebo pills. Those told the pill cost more reported greater pain relief than those told it was discounted.

How sellers use this

Premium pricing signals luxury and quality.
Discounts can sometimes make products seem worse.
New brands may price high to be taken seriously.

When the signal is misleading

Some expensive products are no better than cheaper ones, especially generic medicines, which contain the same active ingredients as branded ones.
Store brands can match branded quality at lower prices.
Sellers may exploit price signals without delivering quality.

Using better information

Read independent reviews and ratings.
Check ingredients, specifications and certifications.
Try blind comparisons, as in taste tests.

The medicine choice

A patient chooses a branded painkiller costing five times more than a generic version, believing it must work better. The active ingredient and dose are identical. The extra money buys a brand, not better medicine.

Thinking higher prices always mean higher quality

Price can signal quality, but many cheaper products perform just as well. Look for direct evidence of quality.

Key takeaways

Buyers often use price to judge quality when they can't assess it directly.
A 2008 wine study found people enjoyed the same wine more when told it was expensive.
Expensive placebo pills produced greater reported pain relief.
Independent information helps avoid overpaying for perceived quality.