Philosopher Jean Baudrillard made a similar observation about the use of material goods as symbols of immaterial values. He noted that any given material object has two kinds of value: it has use value (the amount of utility which can be derived from the good), and it has sign value (a value based on what the object means to the person who owns it.) Advertisers constantly attempt to increase the amount that people will pay for products by infusing them with artificial sign value. Emotional branding, for example, is the practice of using images to link a product with a positive emotional state, so that people will unthinkingly purchase the product when they crave the emotion.