When you shop online, vendors usually give you a bunch of different ways to sort your options. Take Amazon: One popular sorting option – especially for customers with low income – is “Price: Low to High.” You’ve probably used it yourself many times. This doesn’t mean, of course, that people who use this option automatically buy the very cheapest item. Everyone knows that the cheapest tends to be low-quality. But starting with the cheapest options is still a great rule of thumb. If the cheapest option has stellar reviews, you can just buy the cheapest. If the cheapest has...
