Share your insights or perspective on the financial matter presented in the input.

Do retailers ever stock goods just to make other goods sell better? 
There's a concept in retail called a "loss leader", and essentially it means that a store will sell an item intentionally at a loss as a way of bringing in business in the hope that while consumers are in the store taking advantage of the discounted item, they'll make other purchases to make up for the loss and generate an overall profit. Many times it only makes sense to carry items that enhance the value of something else the store sells.  Stores pay big money to study consumer behaviors and preferences in order to understand what items are natural fits for each other and the best ways to market them.   A good example of what you're talking about is the fact that many grocery stores carry private label products that sell for higher margins, and they'll stock them alongside the name brands that cost much more.  As a consequence (and since consumers often don't see a qualitative difference between store brands and name brands much of the time to rationalize spending more), the store's own brands sell better. I hope this helps. Good luck!