Matching Pairs Demand and Factors Affecting DemandOnline version Match the concept with its description. by sarah ayyad 1 . Substitution effect 2 Income effect 3 Population 4 Consumer Preferences 5 law of diminishing marginal utility 6 Complementary Goods 7 Substitute Goods 8 Demand 9 Income 10 Price 11 Advertising amount people buy changes as purchasing power of their income changes changes—even though the income itself does not change. The amount of money that must be paid to acquire a good or service. amount people buy changes as they buy substitute products one whose price has not changed and that offers a better relative value. states that the marginal benefit from using each additional unit of a good or service during a given time period tends to decline as each is used. The total number of people living in a particular area. The quantity of a good or service that consumers are willing and able to buy at a given price. The individual tastes, likes, and dislikes that influence consumer behavior. The promotion of a product or service to increase consumer awareness and demand. Goods that can be used in place of one another. The amount of money or resources that an individual or household earns over a period of time. Goods that are typically consumed together.