A 9-table pastry shop in Ankara Bahçelievler added a ₺245 "Premium Slice" to its menu and watched the ₺145 mid-tier slice suddenly sell 38% more. No magic — just the decoy effect from Dan Ariely's Predictably Irrational.
What Is the Decoy Effect?
The decoy effect (asymmetric dominance) happens when a third "dominated" option is added to a binary choice, shifting preference toward the middle option. In Ariely's famous Economist experiment, students choosing between online-only ($59) and online+print ($125) flipped dramatically when a print-only ($125 — same price, less value) appeared: 84% chose online+print.
Restaurant translation: the most expensive "premium" item isn't meant to sell. It exists to make the mid-tier "target" item feel like the smart choice in a three-way comparison.
Three-Price Anchor Strategy
An optimized menu category has three price points: entry (price-sensitive), target (highest margin), and decoy (prestige). For the pastry shop:
• Classic Slice ₺85 — entry, for budget-conscious guests
• Specialty Slice ₺145 — target, 52% gross margin
• Premium Slice ₺245 — decoy, sells 2-3/month but makes the mid look reasonable
Decoy in a QR Menu
Digital menus like thMenu let you fine-tune decoy placement: item order, photo size, and price formatting per category. Don't put the premium item at the top of the list — place it directly next to your target item. Side-by-side comparison amplifies the decoy effect.
Six weeks of data from the pastry shop: daily slice sales jumped from 37 to 51, average ticket ₺142. Monthly uplift ~₺18,500. The premium slice sells twice a month — but its presence injects "value" into the ₺145 option.
FAQ
Isn't it a loss if the premium item doesn't sell? No. The premium's job is to anchor, not sell. Even two sales a month fulfill its role.
How high should the decoy price be? Sweet spot is 1.5x-2x the target. Above 3x feels absurd and loses anchoring power.
Does it work in every category? Proven in desserts, coffee, mains, and cocktails. Categories with only 1-2 items lack the comparison frame.
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