1. Consider the market for guns. If the price of bullets increases, how will this affect the market for guns, ceteris paribus?
2. Consider the market for DVDs. If the price of movie tickets increases, how will this affect the market for DVDs, ceteris paribus?
3. Consider the market for fast food. If the price of unskilled labor increases, how will this affect the market for fast food, ceteris paribus?
4. Consider the market for health care insurance. If several health care insurers exit the market, how will this affect the market for health care insurance, ceteris paribus?