Final answer:
Normal goods include goods with an income elasticity greater than 1, while inferior goods include goods with an income elasticity less than 1.
Step-by-step explanation:
Economists define normal goods as having a positive income elasticity. Normal goods can be divided into two categories based on their income elasticity:
- Goods with an income elasticity less than 1 are called inferior goods. These are goods for which the demand decreases as income increases. Examples of inferior goods can include generic brands, cheap fast food, or public transportation.
- Goods with an income elasticity greater than 1 are called normal goods. These are goods for which the demand increases as income increases. Examples of normal goods can include luxury goods like jewelry, vacations, or high-end electronic devices.