Asymmetric information and imperfect information tend to distort market price and quantity. The use of a money-back guarantee might work to Nhm la chn cu tr li Stabilize the price and quantity of the product. Enhance the promise of quality and reduce distortion of the market price and quantity. Motivate buyers to intentionally abuse products so that they can get their money back, reducing the impact of distorted market price and quantity. Encourage buyers to worry about why such a guarantee was necessary, increasing the distortion of market price and quantity