Want to sell more of a product or service? Here’s a counterintuitive idea: offer your customers a similar, but inferior, at about the same price. It’s unlikely that they will buy the less attractive item, but you should see a jump in sales of the item you are trying to sell. That’s decoy marketing. Shaving Aisle Decoy Here’s a real-world example. The last time I needed a can of shaving gel, I found myself staring at a shelf full of…