There are many high-fashion, designer pieces Retail Therapist has to forgo—sometimes on an hourly basis—for reasons that don't tend to plague people with more money and closet space. But therein lies an economic principle that RT heretofore considered mythical. The trickle-down effect. Personal politics aside, this effect plays out every day in the circle of retail life. Here's how it works: You don't buy the Marc Jacobs Copper Bolero Jacket for $448, even though it completes you. Someone else—someone to whom $448 is a rounding error, perhaps—does buy it. That person outgrows the jacket—emotionally, spiritually, physically, whatever—sometimes before even wearing it, and offloads it to make room for the new. You buy the jacket at Modo Boutique for $96, new with tags. And everyone lives happily ever after. Modo Boutique, SE 20th and Morrison. Everything available in the boutique is also available online through Modo's ebay store.